[14/n] Introduce a name attribute to _PeriodicTimer (#57143)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/57143
This PR introduces a `name` attribute in `_PeriodicTimer` for testing and debugging purposes.
ghstack-source-id: 127684751
Test Plan: Run the new and updated unit tests.
Reviewed By: tierex
Differential Revision: D28059045
fbshipit-source-id: 9eb067300aea21a99577e6cd8a354f7eb749f4a6
