[llvm] [CodeGen][NPM] Differentiate pipeline-required and opt-required passes (PR #135752)

[Akshat Oke via llvm-commits]

optimisan wrote:

I suppose now it is better.

The "requirement" is not for the pipeline, but only to actually run the pass. (even if it is in the pipeline)

https://github.com/llvm/llvm-project/pull/135752