[HOTFIX] Disable dead bots

All of the luci.flex.try arm64 bots and all of the luci.flex.ci 18.04
arm64 bots have all died without warning.

This patch disables the corresponding builders until the P0 bug
referenced is resolved.

TBR=mfoltz@chromium.org

Bug: 1154014
Change-Id: If544b8673ae7993374d67405f2c918315bd4bf57
Reviewed-on: https://chromium-review.googlesource.com/c/openscreen/+/2566740
Reviewed-by: Jordan Bayles <jophba@chromium.org>
diff --git a/infra/config/global/cr-buildbucket.cfg b/infra/config/global/cr-buildbucket.cfg
index 7a60c48..0596923 100644
--- a/infra/config/global/cr-buildbucket.cfg
+++ b/infra/config/global/cr-buildbucket.cfg
@@ -235,15 +235,17 @@
       mixins: "goma_rbe_ats"
     }
 
-    builders {
-      name: "linux_arm64_debug"
-      mixins: "linux"
-      mixins: "arm64"
-      mixins: "debug"
-      mixins: "sysroot_platform_stretch"
-      mixins: "ci"
-      mixins: "goma_rbe_ats"
-    }
+    # HOTFIX for missing ARM64 bots.
+    # TODO(crbug.com/1154014): ARM64 bots have all been deleted.
+    # builders {
+    #   name: "linux_arm64_debug"
+    #   mixins: "linux"
+    #   mixins: "arm64"
+    #   mixins: "debug"
+    #   mixins: "sysroot_platform_stretch"
+    #   mixins: "ci"
+    #   mixins: "goma_rbe_ats"
+    # }
 
     builders {
       name: "mac_debug"
@@ -345,14 +347,16 @@
       mixins: "goma_rbe_ats"
     }
 
-    builders {
-      name: "linux_arm64_debug"
-      mixins: "linux"
-      mixins: "arm64"
-      mixins: "debug"
-      mixins: "sysroot_platform_stretch"
-      mixins: "goma_rbe_ats"
-    }
+    # HOTFIX for missing ARM64 bots.
+    # TODO(crbug.com/1154014): ARM64 bots have all been deleted.
+    # builders {
+    #   name: "linux_arm64_debug"
+    #   mixins: "linux"
+    #   mixins: "arm64"
+    #   mixins: "debug"
+    #   mixins: "sysroot_platform_stretch"
+    #   mixins: "goma_rbe_ats"
+    # }
 
     builders {
       name: "mac_debug"