Investigate using upstream `url` parser

[antonok-edm]

adblock-rust's URL parsing is an in-tree fork of some files from the rust-url project.

According to eed6eb0, it was done this way in order to slim down the full URL parser, likely for performance reasons. That being said, it's now a ~5 year old implementation that hasn't received any security updates or bugfixes.

If possible, I'd prefer to get this situation sorted out by using a well-audited upstream implementation, whether that is directly from rust-url or elsewhere.