[reland] make ddp logging api to be private (#58089)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/58089
make ddp logging api to be private
ghstack-source-id: 128796419
Test Plan: unit test
Reviewed By: rohan-varma
Differential Revision: D28365412
fbshipit-source-id: 374c01d443ffb47a3706f59e296d6e47eb5f4c85
