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

[Amr Hesham via cfe-commits]

AmrDeveloper wrote:

> ~@AmrDeveloper if you're not tired of these yet, I have one final one: #121307~
> 
> (Update: that one's been taken by another contributor.)

Thank you, if you found another one, I will be interested to work on it, you can assign me directly :D

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