[20/n][torch/elastic][upstream] Move torchelastic.distributed.tests to pytorch.distributed (#56077)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/56077
Move torchelastic.distributed.tests to pytorch.distributed
Test Plan: buck test mode/dev-nosan //pytorch/elastic/torchelastic/distributed/...
Reviewed By: cbalioglu
Differential Revision: D27758303
fbshipit-source-id: c987d4764f4776f55306988b02eae2306db06c2b
