[clang] [llvm] Reland "[LLVM] Add IRNormalizer Pass" (PR #113780)

[Vladimir Vereschaka via cfe-commits]

https://github.com/vvereschaka approved this pull request.

@justinfargnoli ,
I have checked the latest changes locally on the ubuntu expensive builder. They works fine there, thank you. LGTM.

https://github.com/llvm/llvm-project/pull/113780