[clang] [clang-tools-extra] [clangd] Autocomplete fixes for methods (PR #165916)

[Nathan Ridge via cfe-commits]

https://github.com/HighCommander4 commented:

Thanks for the update!

I haven't had a chance to look at the implementation yet (I hope to do so over the next few days), I just looked at the changes to CodeCompleteTests.cpp, and wrote down a few questions I had so far.

https://github.com/llvm/llvm-project/pull/165916