Remove UNC paths in Rust apis as well #12551
Description
I am tired about the complaints and i kinda get it, you just never know which apis / external programs work with them and which don't (including things built into windows...). So since they can't get their shit together in rust-lang/rust#42869 i beg you to do it ourselves, using dunce or std::path::absolute where applicable
While i don't consider this a breaking change, i'll still label it as such.