[llvm] [Passes] Generalize ShouldRunExtraVectorPasses to allow re-use (NFCI). (PR #118323)

[Florian Hahn via llvm-commits]

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fhahn wrote:

Moved to a separate file (llvm/Transforms/Utils/ExtraPassManager), but maybe there's a better place or name?

https://github.com/llvm/llvm-project/pull/118323