[llvm] [BOLT] Improve DWARF CFI generation for pac-ret binaries (PR #163381)

[Paschalis Mpeis via llvm-commits]

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

Hey Gergely,

Thanks for the refactoring. I think it looks good!
I've left a couple of suggestions below.

https://github.com/llvm/llvm-project/pull/163381