Revert D27758303: [20/n][torch/elastic][upstream] Move torchelastic.distributed.tests to pytorch.distributed
Test Plan: revert-hammer
Differential Revision:
D27758303 (https://github.com/pytorch/pytorch/commit/9f6fed8a15a6f64cc2f915f221f2eb4ab0289713)
Original commit changeset: c987d4764f47
fbshipit-source-id: 90846dcd5c8512dd615c7f44dc3663f124cf4a25
