[flang][OpenMP] Add `Id` function to `OmpClause` to return clause id,…#112712

kparzysz merged 2 commits intollvm:mainllvm/llvm-project:mainfrom

kparzysz:users/kparzysz/ompclause-idkparzysz/llvm-project:users/kparzysz/ompclause-idCopy head branch name to clipboard