[llvm] [AArch64][PAC] Specify Defs and Uses of PAUTH_(PROLOGUE|EPILOGUE) (PR #68205)

[Kristof Beyls via llvm-commits]

https://github.com/kbeyls approved this pull request.

LGTM.
I guess you may have seen instructions moved over the PAUTH_PROLOGUE/PAUTH_EPILOGUE pseudo instructions that shouldn't, but there isn't a nice small reproducer for it, so there's no explicit regression test to be added for the bug fixed by this PR?

https://github.com/llvm/llvm-project/pull/68205