[clang] [clang] fix P3310 overload resolution flag propagation (PR #125372)

[Haojian Wu via cfe-commits]

hokein wrote:

The lldb code needs to be updated as well https://github.com/llvm/llvm-project/blob/d5488f157c74332646d2b6e9d16c88e61d5a789e/lldb/source/Plugins/ExpressionParser/Clang/CxxModuleHandler.cpp#L277-L283

https://github.com/llvm/llvm-project/pull/125372