[flang] [llvm] [mlir] [MLIR][Flang][OpenMP] Make omp.simdloop into a loop wrapper (PR #87365)

[Michael Kruse via llvm-commits]

https://github.com/Meinersbur commented:

[nit] There are some whitespace-only changes in tests (trailing space, declaration indention). Would you consider committing those separately as NFC?

https://github.com/llvm/llvm-project/pull/87365