buildscript: fold header/path matching tests to all (#8054)

diff --git a/buildscripts/kokoro/xds.sh b/buildscripts/kokoro/xds.sh
index 893010e..c434382 100755
--- a/buildscripts/kokoro/xds.sh
+++ b/buildscripts/kokoro/xds.sh
@@ -28,7 +28,7 @@
 # --test_case after they are added into "all".
 JAVA_OPTS=-Djava.util.logging.config.file=grpc-java/buildscripts/xds_logging.properties \
   python3 grpc/tools/run_tests/run_xds_tests.py \
-    --test_case="all,path_matching,header_matching,circuit_breaking,timeout,fault_injection,csds" \
+    --test_case="all,circuit_breaking,timeout,fault_injection,csds" \
     --project_id=grpc-testing \
     --project_num=830293263384 \
     --source_image=projects/grpc-testing/global/images/xds-test-server-4 \