[clang-tools-extra] [clangd] Allow --query-driver to match a dot-normalized form of the path (PR #66757)

[Sam McCall via cfe-commits]

sam-mccall wrote:

Thanks! This will fix the double-slash issue (despite the name, `add_dots` normalizes those).

symlinks and progra~1 mean normalization based on actual filesystem access, and choosing between multiple forms that are in some sense equally valid.

I don't think I'm opposed if someone wants to take a shot at solving that (we can *afford* to do IO here), but it's definitely a more complicated idea.

https://github.com/llvm/llvm-project/pull/66757