[clang-tools-extra] clangd: Extend reference search with constructor calls through forwarding (PR #169742)

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timon-ul wrote:

Hm, this checks out with my debugging experience, I guess the body is created in [this line?](https://searchfox.org/llvm/source/clang/lib/Parse/ParseAST.cpp#190) But this still does not make it clear how we deal with this behaviour. Maybe there is a way to hook back into the `SymbolCollector` later and add the reference?

https://github.com/llvm/llvm-project/pull/169742