[clang] [Clang] Refactor uses of `Cand->Function` in SemaOverload.cpp (PR #98965)

[Shafik Yaghmour via cfe-commits]

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

Thank you for this refactor, just a couple of minor comments but otherwise looks good. Please fix first and then merge after it passes tests, if you need someone to merge for you please let me know.

https://github.com/llvm/llvm-project/pull/98965