[iOS][GPU] Consolidate array and non-array kernel for hardswish (#63369)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/63369
ghstack-source-id: 136918152
(Note: this ignores all push blocking failures!)
Test Plan:
- `buck test pp-macos`
- Op tests in PyTorchPlayground app
- Run mobilenetv3 test
https://pxl.cl/1Ncls
Reviewed By: xta0
Differential Revision: D30354454
fbshipit-source-id: 88bf4f8b5871e63170161b3f3e44f99b8a3086c6
