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

[Julian Schmidt via cfe-commits]

https://github.com/5chmidti approved this pull request.

> @5chmidti since you've already looked at this, I'd be happy for you to approve this if you're comfortable doing so.

Sure

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