pytorch

4ff4119d - [rpc] Move _set_rpc_backand and RpcBackendOptions to use float instead of timedelta (#37027)

[rpc] Move _set_rpc_backand and RpcBackendOptions to use float instead of timedelta (#37027) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/37027 The RPC timeout passed into rpc_sync and rpc_async after the below change is now float, so we should make these APIs consistent. ghstack-source-id: 102971906 Test Plan: Existing unittests, also added unittest testing specific timeout set in ProcessGroupRpcBackendOptions and the dispatch rpc backend options handling. Differential Revision: D21125171 fbshipit-source-id: a5894b8ce31d2926f2c3d323d1cda4d54b30cef1