[llvm] [AArch64][LoopIdiom] Generalize AArch64LoopIdiomTransform into LoopIdiomVectorize (PR #94081)

[Min-Yih Hsu via llvm-commits]

mshockwave wrote:

I've renamed the Pass to LoopIdiomVectorize and add a statement in the file header saying that our ultimately goal is to do this in LV instead.

https://github.com/llvm/llvm-project/pull/94081