pytorch

71f9e99e - [torch/elastic] Introduce aux types required by `DynamicRendezvousHandler` (#55932)

[torch/elastic] Introduce aux types required by `DynamicRendezvousHandler` (#55932) Summary: This PR includes the auxiliary types used by the upcoming implementation of the `DynamicRendezvousHandler`. Pull Request resolved: https://github.com/pytorch/pytorch/pull/55932 Test Plan: Run the existing and newly-introduced unit/integration tests. Reviewed By: tierex Differential Revision: D27742329 Pulled By: cbalioglu fbshipit-source-id: cf2e0d88042909739e7c37c25b4b90192c26e198