[clang] [CIR][OpenCL] Attach kernel argument metadata to CIR functions (PR #200581)

[David Rivera via cfe-commits]

https://github.com/RiverDave requested changes to this pull request.

Mostly good, few comments on AS handling yet again.

Since you're stacking this, you could probably make the base of your pr point to this dependency https://github.com/llvm/llvm-project/pull/199530 so the diff is cleaner

https://github.com/llvm/llvm-project/pull/200581