Generate URLs faster - another attempt

[demeritcowboy]

Another attempt at #88

This one seems to work with the edge cases we were having trouble with:

• cache clear
• weirdo urls like civicrm/report/instance/14 where the parameter is part of the path
• oddballs like the civicrm/upgrade queue runner

I have not yet tested the installer or done any benchmarking on speed. Going to do that next.

There's pros and cons to using Civi::cache instead of Civi::statics for storing the menu items, which is the bulk of the problem. It seems to work with either but at the moment I've used cache.
For the known paths, I'm not sure we need to even cache those if we're caching the menu build, but I've left that in.

@MegaphoneJon @jackrabbithanna

[demeritcowboy]

I tested the installer - ok.
For speed tests, with a sample size of 1, I'm not too impressed with the speed improvement. Will need to do more benchmarking. I checked and it is hitting the cache, and the number of items is the same with or without the cache, so it seems to be working as intended.

I'm not worried about the jenkins fails here. Pretty sure they're known issues.