[gloo] Skip registry warning (#31126)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/31126
Gloo device creator registry is throwing warning that confuses users - https://fb.workplace.com/groups/1405155842844877/permalink/3217491788277931/
Create C10_DEFINE_SHARED_REGISTRY_WITHOUT_WARNING API to skip such warning
Test Plan:
{F224342749}
Tested both `C10_DEFINE_SHARED_REGISTRY` and `C10_DEFINE_SHARED_REGISTRY_WITHOUT_WARNING`.
Make sure nothing breaks
Reviewed By: d4l3k
Differential Revision: D18904783
fbshipit-source-id: 0e0065d530956249a18325d4ed3cb58dec255d4c
