[clang] [llvm] [clang][DebugInfo] Emit DW_AT_object_pointer on function declarations with explicit `this` (PR #122928)

[Mats Jun Larsen via llvm-commits]

junlarsen wrote:

I wasn't aware of that exception either, so my apologies there. I still think it's fair policy to keep things as compatible if easily possible though.

https://github.com/llvm/llvm-project/pull/122928