[llvm] [SPIRV] Add support for SPV_KHR_bit_instructions (PR #66215)

[Ilia Diachkov via llvm-commits]

https://github.com/iliya-diyachkov approved this pull request.

It looks good to me. (Please check a small issue in the option description)

https://github.com/llvm/llvm-project/pull/66215