[flang-commits] [clang] [flang] [llvm] [mlir] [Support][NFC] Move OptimizationLevel to the Support directory (PR #157057)

[Sander de Smalen via flang-commits]

https://github.com/sdesmalen-arm approved this pull request.

This OptimizationClass class is pretty trivial. I think it makes sense to move `OptimizationLevel` to Support to avoid an unnecessary dependence on `Passes` when needing to reference `OptimizationLevel::O0`, for example.

https://github.com/llvm/llvm-project/pull/157057