Stop writing logs to root logger (#72649)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/72648
Pull Request resolved: https://github.com/pytorch/pytorch/pull/72649
Reviewed By: soulitzer
Differential Revision: D34172113
Pulled By: mrshenli
fbshipit-source-id: 98cb4140b978a0d9fa53876e427ea3b8bbe884cf
(cherry picked from commit c14297cee66da265e75b1a983622dd5e5a8110f5)
