build: set incompatible_strict_action_env flag to allow caching (#17893)

The incompatible_strict_action_env flag is needed to so that the
bazel cache is not invalidated when running bazel via `yarn bazel`.

Author: josephperrott

.bazelrc

@@ -17,6 +17,10 @@ build --nolegacy_external_runfiles
 run --nolegacy_external_runfiles
 test --nolegacy_external_runfiles
 
+# This flag is needed to so that the bazel cache is not invalidated
+# when running bazel via `yarn bazel`.
+build --incompatible_strict_action_env
+
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