[llvm] [llvm] Remove `inline constexpr` from AArch64TargetParser.h (PR #71602)

[Rob Suderman via llvm-commits]

rsuderman wrote:

> Why are these arrays declared in the .h file? They appear to only be used by AArch64TargetParser.cpp

Sadly they do have uses outside of the target parser. E.g. in `llvm-project/clang/lib/Basic/Targets/AArch64.cpp`

https://github.com/llvm/llvm-project/pull/71602