[clang] [Clang] Instantiate the correct lambda call operator (PR #110446)

[Chuanqi Xu via cfe-commits]

https://github.com/ChuanqiXu9 commented:

Thanks for the analysis!

Further more, if we want to fix such issue better, may be we need to refactor the current `lookup` method into a version that understands modules, then we can do better lookup with modules. This is helpful for https://github.com/llvm/llvm-project/issues/90154. But this is not required here.

https://github.com/llvm/llvm-project/pull/110446