pytorch

32093647 - [11/n] [torch/elastic] Add heartbeat timeout to RendezvousTimeout (#57140)

[11/n] [torch/elastic] Add heartbeat timeout to RendezvousTimeout (#57140) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/57140 This PR introduces a new `heartbeat` attribute in `RendezvousTimeout`. ghstack-source-id: 127626815 Test Plan: Run the updated unit tests. Reviewed By: tierex Differential Revision: D28058908 fbshipit-source-id: c6f8b3a06210cc59714fa841d9387eeb028dc02f