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

[David Spickett via llvm-commits]

DavidSpickett wrote:

The support in lldb was added for arm64e and I see the value in there:
https://github.com/llvm/llvm-project/blob/f956e7fbf161447b9236f7c4448a9d02d3564261/lldb/source/Plugins/Disassembler/LLVMC/DisassemblerLLVMC.cpp#L1426
https://github.com/llvm/llvm-project/blob/main/lldb/test/API/functionalities/ptrauth_diagnostics/brkC47x_code/brkC47x.c

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