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

[Cullen Rhodes via llvm-commits]

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c-rhodes wrote:

I've just been using the -mattr feature name so this would be inconsistent then so I think I'll just leave as is. It is slightly annoying a character was skipped tho, would one more character hurt! 

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