fix: pass model.random to schedulers

[quaquel]

As pionted out in by @EwoutH, #2350 broke the tutorial. This is due to not updating the schedulers to pass model.random. This fixes that bug (and does a few minor updates to the tutorial).

The tutorial needs a complete update to remove schedulers and use (in my view) the new grid spaces. I am not going to do that in this PR.

[github-actions]

Performance benchmarks:

Model	Size	Init time [95% CI]	Run time [95% CI]
BoltzmannWealth	small	🔵 +0.3% [-0.3%, +0.9%]	🔵 +0.1% [-0.0%, +0.3%]
BoltzmannWealth	large	🔵 +0.7% [-0.6%, +1.9%]	🔵 +1.6% [+0.1%, +3.2%]
Schelling	small	🔵 -0.1% [-0.7%, +0.5%]	🔵 +2.2% [+1.3%, +3.1%]
Schelling	large	🔵 +0.6% [-1.5%, +2.4%]	🔵 +0.2% [-1.8%, +2.3%]
WolfSheep	small	🔵 +1.5% [+1.1%, +1.9%]	🔵 +1.6% [+1.2%, +2.2%]
WolfSheep	large	🔵 +0.2% [-0.6%, +1.0%]	🔵 +1.2% [-0.9%, +2.9%]
BoidFlockers	small	🔵 +1.0% [+0.4%, +1.7%]	🔵 +0.9% [+0.4%, +1.4%]
BoidFlockers	large	🔵 +1.0% [-0.4%, +2.0%]	🔵 +1.1% [+0.4%, +1.7%]

[EwoutH]

Thanks for the quick fix, changes to time.py look good. It's nice to give it a proper deprecation period this way.

Few comments about the files.

I am not going to do that in this PR.

So you say ;)

Luckily Tom is already on it!

[quaquel]

I reverted all notebook stuff to make @tpike3 life easier.

[EwoutH]

Awesome!