[clang] [clang-tools-extra] [lldb] [clang][AST][NFC] Tree-wide removal of deprecated `getQualifiedNameAsString()` (PR #218264)

[Paul Kirth via cfe-commits]

https://github.com/ilovepi requested changes to this pull request.

Like others, I'm pretty against this overall. It seems like churn for churn's sake.

Additionally, I don't think this should be a monolithic patch, as its hard to review and ensure nothing is escaping relevant maintainers. For clang-doc, I'm quite opposed to this boilerplate code expansion.  At the very least, we'd make a helper to encapsulate that logic, which begs the question about removing the API altogether.  There's a slo a few places where I do not agree with the changed implementation, even if the end result is consistent.

If you want to continue this, you may, but the clang-doc changes need to be split out.

https://github.com/llvm/llvm-project/pull/218264