Mob movement rewrite (#35931)

Mob movement rewrite (#35931)

* Conveyor optimisations

- Optimise movement for moving stuff. Better flags + less resolves + slapped parallelrobustjob on it.
- Sleeping for entities getting conveyed into walls.

* Blocker version

* Finish

* Final

* Fix conveyor power mispredict

* Bagel save

* Revert "Bagel save"

This reverts commit 1b93fda81fb852d89b89b0beae0b80f8a61165f2.

* Conveyor resave

* Fix prediction

* Mob movement rewrite

* Bandaid

* Working version

* Tentatively working

* Friction to fix cornering

* More fixes

* Revert bagel

* Revert this

* a

* Reviewed

* Funky re-save

* Fix velocity

* Table fix

* Review

* a