Disable tsan for test_c10d multiprocess test cases. (#28385)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/28385
TSAN doesn't work with multiprocessing with fork() since we end up
forking in a multithreaded environment which is dangerous. As a result, I'm
disabling TSAN in this change.
Similar to https://github.com/pytorch/pytorch/pull/27410 and
https://github.com/pytorch/pytorch/pull/25005
ghstack-source-id: 92319347
Test Plan: waitforbuildbot
Differential Revision: D18047778
fbshipit-source-id: 6c4e251639f74f4c772bd09bc6f2dfa83cf18fad
