Maximally constrained Z-belt inserts for Voron 2.4

This is part two of a remix of 2 voron mods: the 2.2 Z-belt covers with hidden cable routing and the matching cover inserts.

Its purpose is to keep as much heat inside the chamber as possible by shrinking the opening for the Z-belt in the cover and expanding the insert.

Print 2 of each and 2 of each mirrored.

The mod is divided into 2 things because of a license difference between the original models.

Part 1: https://www.printables.com/model/839555-maximally-constrained-z-belt-covers-for-voron-24

The inserts have been expanded to be as close to the belts as possible and remove any unnecessary space for worm air to travel down to the electronics compartment.