Tensor and device is_hpu methods (#65408)
Summary:
Add is_hpu() methods for Aten tensor and device
Pull Request resolved: https://github.com/pytorch/pytorch/pull/65408
Reviewed By: malfet
Differential Revision: D31144227
Pulled By: wconstab
fbshipit-source-id: 115f4df4b8d54e6913dd51af7b6d4cacf6dd43c5
