[clang] [clang][Sema] Handle dependent qualifier in HeuristicResolver::resolveDeclRefExpr() (PR #124515)

[Nathan Ridge via cfe-commits]

HighCommander4 wrote:

(This is something I noticed while working on the improvements discussed [here](https://github.com/llvm/llvm-project/pull/124451#discussion_r1929954747). Sending out separately to keep things easy to review.)

https://github.com/llvm/llvm-project/pull/124515