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

[Reid Kleckner via llvm-commits]

rnk wrote:

This also needs a test. I booted up my Windows machine to try to better understand what needs to be done, but I had to prioritize other work in the meantime and haven't gotten around to it.

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