pytorch

3b7e4f89 - Add deprecation warning to PG backend and make TP backend stable. (#45356)

Add deprecation warning to PG backend and make TP backend stable. (#45356) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/45356 In this PR, I'm adding a warning to the PG backend mentioning it would be deprecated in the future. In addition to this I removed the warning from the TP backend that it is a beta feature. ghstack-source-id: 112940501 Test Plan: waitforbuildbot Reviewed By: mrshenli Differential Revision: D23940144 fbshipit-source-id: d44054aa1e4ef61004a40bbe0ec45ff07829aad4