[clang-tools-extra] [clangd] Let DefineOutline tweak handle member functions (PR #95235)

[Julian Schmidt via cfe-commits]

https://github.com/5chmidti commented:

>From a functionality standpoint, this looks good to me. I noted some small things in the code, and this is also missing a release not entry.

https://github.com/llvm/llvm-project/pull/95235