pytorch

e5e095cb - [torch/elastic] Rename etcd-/c10d-experimental to etcd-v2 and c10d (#57764)

[torch/elastic] Rename etcd-/c10d-experimental to etcd-v2 and c10d (#57764) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/57764 As discussed offline this PR renames etcd-experimental backend to etcd-v2 and c10d-experimental backend to c10d. ghstack-source-id: 128342523 Test Plan: Run the existing unit tests. Reviewed By: kiukchung Differential Revision: D28263739 fbshipit-source-id: c3409037ecea5a8ff6daadeeb1f2fb4205cc3852