transport open registration (#30167)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/30167
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29164
- Created GlooDeviceFactory to hide device creation details
- Added transport option while on Python interface
The reason of making the factory class is to make it easier to extend gloo transport in the future
Test Plan: Imported from OSS
Reviewed By: satgera, d4l3k
Differential Revision: D18596527
fbshipit-source-id: e8114162ee8d841c0e0769315b48356b37d6ca0a
