Add Vulkan tensor copy. (#46481)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/46481
Test Plan: Imported from OSS
Reviewed By: IvanKobzarev
Differential Revision: D24379143
Pulled By: AshkanAliabadi
fbshipit-source-id: cf492c5c632bf193c8aff0169d17bbf962e019e1
