[Vulkan] Replace GruOpContext by VulkanOpContext (#78816)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/78816
ghstack-source-id: 158143559
Reviewed By: SS-JIA
Differential Revision: D36605274
fbshipit-source-id: e83a1dc0518dac5a576a51e7c2c3d82871904cec
