[clang] [Clang][ASTMatcher] Add `dependentNameType` Matcher (PR #121263)

[Nathan Ridge via cfe-commits]

HighCommander4 wrote:

@AmrDeveloper if you're not tired of these yet, I have one final one: https://github.com/llvm/llvm-project/issues/121307

https://github.com/llvm/llvm-project/pull/121263