[llvm] [AArch64][PAC] Refine authenticated pointer check methods (PR #74074)

[David Spickett via llvm-commits]

DavidSpickett wrote:

Definitely agree, it's ok for Apple who only use lldb but once we get this on Linux there's the question of GDB as well so very good to stick with one set of values.

Are these values something that will be included in the ABI, or should be? Strange thing to be in an ABI I guess, but if we're agreeing on values sounds like it could be.

https://github.com/llvm/llvm-project/pull/74074