[llvm] [AArch64] Remove TargetParser CPU/Arch feature tests (PR #104587)

[Lucas Duarte Prates via llvm-commits]

https://github.com/pratlucas approved this pull request.

LGTM. The new tests are indeed much easier to deal with and cover the same cases.

https://github.com/llvm/llvm-project/pull/104587