[clang] [AArch64][PAC] Emit `!dbg` locations in `*_vfpthunk_` functions (PR #179688)

[Anatoly Trosinenko via cfe-commits]

https://github.com/atrosinenko commented:

@kovdan01 Clarified the description, thanks! Hopefully this resolves your other questions as well.

https://github.com/llvm/llvm-project/pull/179688