Enable --flaky_test_attempts in release branch

Author: rtg0795

.bazelrc

@@ -684,6 +684,7 @@ try-import %workspace%/.bazelrc.user
 # Here are bazelrc configs for release builds
 # Build TensorFlow v2.
 test:release_base --test_size_filters=small,medium
+test:release_base --flaky_test_attempts=3
 
 # Enable support for all targets
 build:release_base --config=cpu_cross

tensorflow/tools/ci_build/osx/arm64/.macos.bazelrc

@@ -26,6 +26,7 @@ test --verbose_failures=true --local_test_jobs=HOST_CPUS --test_output=errors
 # Increase the test timeout as tests often take longer on mac.
 test --test_timeout=300,450,1200,3600
 test --test_size_filters=small,medium
+test --flaky_test_attempts=3
 
 # Only build what is required to run the tests
 test --build_tests_only --keep_going