Enable bfloat16 random kernels on Windows (#44918)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/33793
Pull Request resolved: https://github.com/pytorch/pytorch/pull/44918
Reviewed By: pbelevich
Differential Revision: D23777548
Pulled By: ngimel
fbshipit-source-id: 9cf13166d7deba17bc72e402b82ed0afe347cb9b
