[llvm] [SPIRV] support for extension SPV_INTEL_maximum_registers (PR #137229)

[VISHAKH PRAKASH via llvm-commits]

VishMCW wrote:

Buildkite CI failed due to a Git lock (.lock file) — looks unrelated to this patch. Could someone please retry the build? @michalpaszkowski 

https://github.com/llvm/llvm-project/pull/137229