[llvm] [SPIRV] Add `SPV_INTEL_kernel_attributes` (PR #165891)

[Dmitry Sidorov via llvm-commits]

https://github.com/MrSidims commented:

Overall LGTM, I just would like to suggest unused capabilities and decorations.
Also, what about:
Add SPV_INTEL_kernel_attributes ->
Enable OpenCL max_work_group_size translation via SPV_INTEL_kernel_attributes 
?

https://github.com/llvm/llvm-project/pull/165891