[clang] [clang][DebugInfo] Make fwd decl call site debug info consistent for methods (PR #222263)

[J. Ryan Stinnett via cfe-commits]

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

Seems reasonable overall. I am also wondering the same things as @jmorse.

https://github.com/llvm/llvm-project/pull/222263