[clang] [Clang][ASTMatcher] Add a matcher for the name of a DependentScopeDeclRefExpr (PR #121656)

[Nathan Ridge via cfe-commits]

https://github.com/HighCommander4 requested changes to this pull request.

Thanks for implementing this!

The patch looks pretty good, I just have some minor comments and a suggestion for a new test case.

https://github.com/llvm/llvm-project/pull/121656