Remove Url generator from router class

This looks good, nice little cleanup.

Couldn't resist to try my debug file idea, it's a bit tricky to diff, there are also some seemingly unrelated changes that I'm seeing, I think the whole thing isn't quite stable yet, possibly due to caches warming up, so I did a git diff words, as a screenshot.

Essentially, the url_generator moves down to the maintenance mode subscriber. Which is likely another good target for some service locators, it has a ton of dependencies that only needed if maintenance mode is on.

This also shows the middleware issue that 🐛 Regression: All stack middlewares are constructed at the same time even for cached pages Active is working on quite nicely.

I'll share more of that and some example files later in 📌 Explore using more service closures to break deep dependency chains and load fewer services Active .

Committed 4748574 and pushed to 11.x. Thanks!