add BFloat16 support for arange on CPU (#60444)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/60444
Reviewed By: VitalyFedyunin
Differential Revision: D29330585
Pulled By: ezyang
fbshipit-source-id: b8a04cee0c3f2ff5544e2b821324ce8fc4e9d0f2
