[llvm] [AArch64] Generalize integer FPR lane stores for all types (PR #134117)

[Paul Walker via llvm-commits]

https://github.com/paulwalker-arm commented:

I think we're pretty much there now with the bones of the patch looking good.  That said, there are a couple of idiom switches (most importantly the "int add" -> "vector mov") that I would like us to avoid if possible.

https://github.com/llvm/llvm-project/pull/134117