[clang] [clang][HeuristicResolver] Only perform qualifier check for instance methods (PR #125166)

[Nathan Ridge via cfe-commits]

HighCommander4 wrote:

Part of me wonders if there's ever a legitimate reason to call `CXXMethodDecl::getMethodQualifiers()` on a static method...

https://github.com/llvm/llvm-project/pull/125166