make log lines info to help out a customer (#31842)

diff --git a/src/core/lib/channel/promise_based_filter.cc b/src/core/lib/channel/promise_based_filter.cc
index 4f2bbd2..29f046a 100644
--- a/src/core/lib/channel/promise_based_filter.cc
+++ b/src/core/lib/channel/promise_based_filter.cc
@@ -246,7 +246,7 @@
     BaseCallData* call =
         static_cast<BaseCallData*>(batch->handler_private.extra_arg);
     if (grpc_trace_channel.enabled()) {
-      gpr_log(GPR_DEBUG, "FLUSHER:forward batch via closure: %s",
+      gpr_log(GPR_INFO, "FLUSHER:forward batch via closure: %s",
               grpc_transport_stream_op_batch_string(batch).c_str());
     }
     grpc_call_next_op(call->elem(), batch);
@@ -255,7 +255,7 @@
   for (size_t i = 1; i < release_.size(); i++) {
     auto* batch = release_[i];
     if (grpc_trace_channel.enabled()) {
-      gpr_log(GPR_DEBUG, "FLUSHER:queue batch to forward in closure: %s",
+      gpr_log(GPR_INFO, "FLUSHER:queue batch to forward in closure: %s",
               grpc_transport_stream_op_batch_string(release_[i]).c_str());
     }
     batch->handler_private.extra_arg = call_;
@@ -267,7 +267,7 @@
   }
   call_closures_.RunClosuresWithoutYielding(call_->call_combiner());
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "FLUSHER:forward batch: %s",
+    gpr_log(GPR_INFO, "FLUSHER:forward batch: %s",
             grpc_transport_stream_op_batch_string(release_[0]).c_str());
   }
   grpc_call_next_op(call_->elem(), release_[0]);
@@ -301,7 +301,7 @@
 
 void BaseCallData::SendMessage::StartOp(CapturedBatch batch) {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s SendMessage.StartOp st=%s", base_->LogTag().c_str(),
+    gpr_log(GPR_INFO, "%s SendMessage.StartOp st=%s", base_->LogTag().c_str(),
             StateString(state_));
   }
   switch (state_) {
@@ -327,7 +327,7 @@
 
 void BaseCallData::SendMessage::GotPipe(PipeReceiver<MessageHandle>* receiver) {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s SendMessage.GotPipe st=%s", base_->LogTag().c_str(),
+    gpr_log(GPR_INFO, "%s SendMessage.GotPipe st=%s", base_->LogTag().c_str(),
             StateString(state_));
   }
   GPR_ASSERT(receiver != nullptr);
@@ -372,7 +372,7 @@
 void BaseCallData::SendMessage::OnComplete(absl::Status status) {
   Flusher flusher(base_);
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s SendMessage.OnComplete st=%s status=%s",
+    gpr_log(GPR_INFO, "%s SendMessage.OnComplete st=%s status=%s",
             base_->LogTag().c_str(), StateString(state_),
             status.ToString().c_str());
   }
@@ -400,7 +400,7 @@
 
 void BaseCallData::SendMessage::Done(const ServerMetadata& metadata) {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s SendMessage.Done st=%s md=%s",
+    gpr_log(GPR_INFO, "%s SendMessage.Done st=%s md=%s",
             base_->LogTag().c_str(), StateString(state_),
             metadata.DebugString().c_str());
   }
@@ -428,7 +428,7 @@
 
 void BaseCallData::SendMessage::WakeInsideCombiner(Flusher* flusher) {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s SendMessage.WakeInsideCombiner st=%s%s",
+    gpr_log(GPR_INFO, "%s SendMessage.WakeInsideCombiner st=%s%s",
             base_->LogTag().c_str(), StateString(state_),
             state_ == State::kBatchCompleted
                 ? absl::StrCat(" status=", completed_status_.ToString()).c_str()
@@ -455,7 +455,7 @@
       auto r_push = (*push_)();
       if (auto* p = absl::get_if<bool>(&r_push)) {
         if (grpc_trace_channel.enabled()) {
-          gpr_log(GPR_DEBUG,
+          gpr_log(GPR_INFO,
                   "%s SendMessage.WakeInsideCombiner push complete, result=%s",
                   base_->LogTag().c_str(), *p ? "true" : "false");
         }
@@ -469,7 +469,7 @@
       auto r_next = (*next_)();
       if (auto* p = absl::get_if<NextResult<MessageHandle>>(&r_next)) {
         if (grpc_trace_channel.enabled()) {
-          gpr_log(GPR_DEBUG,
+          gpr_log(GPR_INFO,
                   "%s SendMessage.WakeInsideCombiner next complete, "
                   "result.has_value=%s",
                   base_->LogTag().c_str(), p->has_value() ? "true" : "false");
@@ -543,7 +543,7 @@
 
 void BaseCallData::ReceiveMessage::StartOp(CapturedBatch& batch) {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s ReceiveMessage.StartOp st=%s",
+    gpr_log(GPR_INFO, "%s ReceiveMessage.StartOp st=%s",
             base_->LogTag().c_str(), StateString(state_));
   }
   switch (state_) {
@@ -581,7 +581,7 @@
 
 void BaseCallData::ReceiveMessage::GotPipe(PipeSender<MessageHandle>* sender) {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s ReceiveMessage.GotPipe st=%s",
+    gpr_log(GPR_INFO, "%s ReceiveMessage.GotPipe st=%s",
             base_->LogTag().c_str(), StateString(state_));
   }
   switch (state_) {
@@ -615,7 +615,7 @@
 
 void BaseCallData::ReceiveMessage::OnComplete(absl::Status status) {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s ReceiveMessage.OnComplete st=%s status=%s",
+    gpr_log(GPR_INFO, "%s ReceiveMessage.OnComplete st=%s status=%s",
             base_->LogTag().c_str(), StateString(state_),
             status.ToString().c_str());
   }
@@ -652,7 +652,7 @@
 void BaseCallData::ReceiveMessage::Done(const ServerMetadata& metadata,
                                         Flusher* flusher) {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s ReceiveMessage.Done st=%s md=%s",
+    gpr_log(GPR_INFO, "%s ReceiveMessage.Done st=%s md=%s",
             base_->LogTag().c_str(), StateString(state_),
             metadata.DebugString().c_str());
   }
@@ -702,7 +702,7 @@
 
 void BaseCallData::ReceiveMessage::WakeInsideCombiner(Flusher* flusher) {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG,
+    gpr_log(GPR_INFO,
             "%s ReceiveMessage.WakeInsideCombiner st=%s push?=%s next?=%s",
             base_->LogTag().c_str(), StateString(state_),
             push_.has_value() ? "yes" : "no", next_.has_value() ? "yes" : "no");
@@ -749,7 +749,7 @@
       auto r_push = (*push_)();
       if (auto* p = absl::get_if<bool>(&r_push)) {
         if (grpc_trace_channel.enabled()) {
-          gpr_log(GPR_DEBUG,
+          gpr_log(GPR_INFO,
                   "%s ReceiveMessage.WakeInsideCombiner push complete: %s",
                   base_->LogTag().c_str(), *p ? "true" : "false");
         }
@@ -762,7 +762,7 @@
       auto r_next = (*next_)();
       if (auto* p = absl::get_if<NextResult<MessageHandle>>(&r_next)) {
         if (grpc_trace_channel.enabled()) {
-          gpr_log(GPR_DEBUG,
+          gpr_log(GPR_INFO,
                   "%s ReceiveMessage.WakeInsideCombiner next complete: %s",
                   base_->LogTag().c_str(),
                   p->has_value() ? "got message" : "end of stream");
@@ -793,7 +793,7 @@
       GPR_ASSERT(push_.has_value());
       if (!absl::holds_alternative<Pending>((*push_)())) {
         if (grpc_trace_channel.enabled()) {
-          gpr_log(GPR_DEBUG,
+          gpr_log(GPR_INFO,
                   "%s ReceiveMessage.WakeInsideCombiner push complete",
                   base_->LogTag().c_str());
         }
@@ -888,7 +888,7 @@
 
   void Run() {
     if (grpc_trace_channel.enabled()) {
-      gpr_log(GPR_DEBUG, "%s ClientCallData.PollContext.Run %s",
+      gpr_log(GPR_INFO, "%s ClientCallData.PollContext.Run %s",
               self_->LogTag().c_str(), self_->DebugString().c_str());
     }
     GPR_ASSERT(have_scoped_activity_);
@@ -950,7 +950,7 @@
         // Poll the promise once since we're waiting for it.
         Poll<ServerMetadataHandle> poll = self_->promise_();
         if (grpc_trace_channel.enabled()) {
-          gpr_log(GPR_DEBUG, "%s ClientCallData.PollContext.Run: poll=%s",
+          gpr_log(GPR_INFO, "%s ClientCallData.PollContext.Run: poll=%s",
                   self_->LogTag().c_str(),
                   PollToString(poll, [](const ServerMetadataHandle& h) {
                     return h->DebugString();
@@ -1210,7 +1210,7 @@
   Flusher flusher(this);
 
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s StartBatch %s", LogTag().c_str(),
+    gpr_log(GPR_INFO, "%s StartBatch %s", LogTag().c_str(),
             DebugString().c_str());
   }
 
@@ -1335,7 +1335,7 @@
 // Handle cancellation.
 void ClientCallData::Cancel(grpc_error_handle error, Flusher* flusher) {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s Cancel error=%s", LogTag().c_str(),
+    gpr_log(GPR_INFO, "%s Cancel error=%s", LogTag().c_str(),
             error.ToString().c_str());
   }
   // Track the latest reason for cancellation.
@@ -1408,7 +1408,7 @@
 
 void ClientCallData::RecvInitialMetadataReady(grpc_error_handle error) {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s ClientCallData.RecvInitialMetadataReady %s",
+    gpr_log(GPR_INFO, "%s ClientCallData.RecvInitialMetadataReady %s",
             LogTag().c_str(), DebugString().c_str());
   }
   ScopedContext context(this);
@@ -1490,7 +1490,7 @@
 ArenaPromise<ServerMetadataHandle> ClientCallData::MakeNextPromise(
     CallArgs call_args) {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s ClientCallData.MakeNextPromise %s", LogTag().c_str(),
+    gpr_log(GPR_INFO, "%s ClientCallData.MakeNextPromise %s", LogTag().c_str(),
             DebugString().c_str());
   }
   GPR_ASSERT(poll_ctx_ != nullptr);
@@ -1554,7 +1554,7 @@
 // application.
 Poll<ServerMetadataHandle> ClientCallData::PollTrailingMetadata() {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s ClientCallData.PollTrailingMetadata %s",
+    gpr_log(GPR_INFO, "%s ClientCallData.PollTrailingMetadata %s",
             LogTag().c_str(), DebugString().c_str());
   }
   GPR_ASSERT(poll_ctx_ != nullptr);
@@ -1606,7 +1606,7 @@
 void ClientCallData::RecvTrailingMetadataReady(grpc_error_handle error) {
   Flusher flusher(this);
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG,
+    gpr_log(GPR_INFO,
             "%s ClientCallData.RecvTrailingMetadataReady "
             "recv_trailing_state=%s error=%s md=%s",
             LogTag().c_str(), StateString(recv_trailing_state_),
@@ -1800,7 +1800,7 @@
 
 ServerCallData::~ServerCallData() {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s ~ServerCallData %s", LogTag().c_str(),
+    gpr_log(GPR_INFO, "%s ~ServerCallData %s", LogTag().c_str(),
             DebugString().c_str());
   }
   GPR_ASSERT(poll_ctx_ == nullptr);
@@ -1821,7 +1821,7 @@
   bool wake = false;
 
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s StartBatch: %s", LogTag().c_str(),
+    gpr_log(GPR_INFO, "%s StartBatch: %s", LogTag().c_str(),
             DebugString().c_str());
   }
 
@@ -2062,7 +2062,7 @@
 
 void ServerCallData::RecvTrailingMetadataReady(grpc_error_handle error) {
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s: RecvTrailingMetadataReady error=%s md=%s",
+    gpr_log(GPR_INFO, "%s: RecvTrailingMetadataReady error=%s md=%s",
             LogTag().c_str(), error.ToString().c_str(),
             recv_trailing_metadata_->DebugString().c_str());
   }
@@ -2081,7 +2081,7 @@
 void ServerCallData::RecvInitialMetadataReady(grpc_error_handle error) {
   Flusher flusher(this);
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s: RecvInitialMetadataReady %s", LogTag().c_str(),
+    gpr_log(GPR_INFO, "%s: RecvInitialMetadataReady %s", LogTag().c_str(),
             error.ToString().c_str());
   }
   GPR_ASSERT(recv_initial_state_ == RecvInitialState::kForwarded);
@@ -2143,7 +2143,7 @@
 void ServerCallData::WakeInsideCombiner(Flusher* flusher) {
   PollContext poll_ctx(this, flusher);
   if (grpc_trace_channel.enabled()) {
-    gpr_log(GPR_DEBUG, "%s: WakeInsideCombiner %s", LogTag().c_str(),
+    gpr_log(GPR_INFO, "%s: WakeInsideCombiner %s", LogTag().c_str(),
             DebugString().c_str());
   }
   if (send_initial_metadata_ != nullptr &&
@@ -2169,7 +2169,7 @@
     Poll<ServerMetadataHandle> poll;
     poll = promise_();
     if (grpc_trace_channel.enabled()) {
-      gpr_log(GPR_DEBUG, "%s: WakeInsideCombiner poll=%s", LogTag().c_str(),
+      gpr_log(GPR_INFO, "%s: WakeInsideCombiner poll=%s", LogTag().c_str(),
               PollToString(poll, [](const ServerMetadataHandle& h) {
                 return h->DebugString();
               }).c_str());