[llvm] [llvm-mca][AArch64] Merge Neoverse NEON tests (NFC) (PR #170881)

[Cullen Rhodes via llvm-commits]

c-rhodes wrote:

> Thanks very much for working on this, LGTM!
> 
> Do you think it would make sense to place these inputs somewhere outside Neoverse/?

Thanks for reviewing! Yes I think that'd be a good direction to go eventually, I'd like to do the SVE instructions next but not sure when I'll get to that.

https://github.com/llvm/llvm-project/pull/170881