[20/n][torch/elastic][upstream] Move torchelastic.distributed.tests to pytorch.distributed (#56215)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/56215
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: H-Huang
Differential Revision: D27808887
fbshipit-source-id: 6c9e2cba0bb202d8a5497697773d48e215e555f8
