[llvm] [BOLT][AArch64] Support for pointer authentication (v2) (PR #120064)

[Paschalis Mpeis via llvm-commits]

https://github.com/paschalis-mpeis commented:

Thanks for addressing my comments @bgergely0!

I've added a few more nits. Let's wait on the scheduling policy and feel free to reach out regarding tests.

https://github.com/llvm/llvm-project/pull/120064