Change weight scale test to cpu only (#35346)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/35346
weight scale op doesn't have GPU impl. This is breaking OSS CI from D20506032. Making it cpu only
Test Plan: OSS CI
Reviewed By: ustctf
Differential Revision: D20637440
fbshipit-source-id: 9aa6cce63ce637ab7856788e5d02f527decb2a26
