[Vulkan] Replace LinearOpContext by VulkanOpContext (#78815)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/78815
ghstack-source-id: 158143561
Reviewed By: SS-JIA
Differential Revision: D36605273
fbshipit-source-id: 8deb0e6f857117ab3753cf73ca67598315b8651e
