[mlir][spirv] Add GpuToLLVM cconv suited to Vulkan, migrate last tests#123384

andfau-amd merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

andfau-amd:73457-runner-migration-vulkan-pipeline-with-serialization-wrappers-new-abiandfau-amd/llvm-project:73457-runner-migration-vulkan-pipeline-with-serialization-wrappers-new-abiCopy head branch name to clipboard