pytorch

233004b4 - [13/n] Extend the return type of RendezvousBackend's set_state method (#57142)

[13/n] Extend the return type of RendezvousBackend's set_state method (#57142) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/57142 This PR extends the return type of `RendezvousBackend`'s `set_state` method with an additional boolean flag that specifies whether the write attempt has succeeded. ghstack-source-id: 127629538 Test Plan: Run the updated unit tests. Reviewed By: tierex Differential Revision: D28058980 fbshipit-source-id: 26333790c39386891beb155b20ba1291d2cbdd03