[Vulkan] Added Hardshrink op (#62870)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/62870
Added Hardshrink operator for Vulkan
Added tests for Hardshrink op
Reference: [Hardshrink](https://pytorch.org/docs/stable/generated/torch.nn.Hardshrink.html#torch.nn.Hardshrink)
Test Plan: Imported from OSS
Reviewed By: SS-JIA
Differential Revision: D30174950
Pulled By: beback4u
fbshipit-source-id: 3e192390eb9f92abecae966e84bbfae356bfd7c8
