pytorch

8f1564b8 - Add enum type to rpc registry for consolidating RPC initialization code path (#28628)

Add enum type to rpc registry for consolidating RPC initialization code path (#28628) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/28628 Consolidate code paths of ProcessGroupAgent construction and other RPC Backend construction. ghstack-source-id: 92845348 Differential Revision: D5516188 fbshipit-source-id: 151d9b7b74f68631d6673fecc74dec525949b8f0