Enable TensorPipe's CMA channel (#50759)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/50759
ghstack-source-id: 120032288
Test Plan: Exported to CircleCI and tested
Reviewed By: mrshenli
Differential Revision: D25959326
fbshipit-source-id: be6df209ff3a79a8961acbda64ee7805a5c434a9
