[llvm] [AArch64][llvm] Some instructions should be `HINT` aliases (NFC) (PR #189926)

[Jonathan Thackray via llvm-commits]

jthackray wrote:

> Can you add tests for: hint #48, hint #49, hint #50, hint #51 I believe they are all stshh or shuh alias for hint. We should also add hint tests for tsb and stshh Similar to what was done in AArch64/armv8.5a-bti.s

Good idea. I've expanded to add for all `hint #nn` tests that were missing, so we have complete coverage now.

https://github.com/llvm/llvm-project/pull/189926