[llvm] Supports viewing class member variables in lambda when using the vs debugger (PR #71564)

[Zequan Wu via llvm-commits]

https://github.com/ZequanWu commented:

> And how to add a test, which affects whether the debugger can recognize

In terms of test, I think you can add a test to check if the generated member name is "__this" using `llvm-pdbutil` and run check-llvm.

https://github.com/llvm/llvm-project/pull/71564