Torchelastic: forbid mp tests running with *san (#56827)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/56827
The diff makes sure that mp tests are not executed in modes that allow *san, since python mp does not behave well with tsan and asan.
Test Plan: buck test mode/opt-tsan //caffe2/test/distributed/launcher/... -- --run-disabled
Reviewed By: cbalioglu
Differential Revision: D27976626
fbshipit-source-id: 7747d67687fa0fd095f799b3708038f672119e73
