[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:

Thanks, I'm not very opinionated on it, but since a lot of libraries in various languages rely on the C API I think it's fair to keep comparible if it makes sense

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