Message Delay fix for test_check_failed_messages (#37978)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37978
Faulty PGA tests now have message delayed by default. Tests that were written prior to this addition should explicitly turn this off since they are not designed to work reliably with message delays.
ghstack-source-id: 103622888
Test Plan: Stress-running this test with TSAN. Also added a sanity check in the verify_backend_options test that verifies the default value of `messages_to_delay`.
Differential Revision: D21440043
fbshipit-source-id: 78151f07a3294c3dfcfaeacd6a5e5b77a0f34da1
