[DDP Logging] Log use of uneven inputs API (#54919)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/54919
Log the use of uneven inputs API for better tracking and use case
detection.
ghstack-source-id: 125446499
Test Plan: CI, added ut
Reviewed By: zhaojuanmao, SciPioneer
Differential Revision: D27410764
fbshipit-source-id: abc8055a2e15a3ee087d9959f8881b05a0ea933e
