[llvm] [AArch64][PAC] Lower direct authenticated calls to ptrauth constants. (PR #97664)

[Daniil Kovalev via llvm-commits]

kovdan01 wrote:

@ahmedbougacha Could you please explicitly add smth like "Depends on #97665" to the PR description?  Without applying that changes, tests fail since they require ptrauth constants lowering on MachO.

https://github.com/llvm/llvm-project/pull/97664