[clang] [CIR] Auto-generate matchAndRewrite for one-to-one CIR-to-LLVM lowerings (PR #190326)

[Amr Hesham via cfe-commits]

AmrDeveloper wrote:

I fixed the error in CI now related to `error: enumeration value 'OMPSplitDirectiveClass' not handled in switch` locally and will prepare a PR now

https://github.com/llvm/llvm-project/pull/190326