[llvm] [VectorCombine] Generalize foldBitOpOfBitcasts to support more cast operations (PR #148350)

[Rahul Yadav via llvm-commits]

rhyadav wrote:

thanks @RKSimon for reviewing this, all CI checks have passed, if you're planning to create issues to pass flags using `CastInst::Create` , happy to take on those, pls feel free to assign

https://github.com/llvm/llvm-project/pull/148350