Rework T3 Static Artillery to use rockets instead of projectiles

[Exotic-Retard]

The model is the same for now, but something interesting to try out for the Desolator is to convert it into rocket artillery.

The simple implementation is the following:
1.Hide the gun bone via scripts on the model
2.Increase size of model slightly
3.Remove thruster effects
4.Remove existing weapon
5.Add new weapon that fires 6 missiles from the 6 thruster bones - the missiles fly accross the map then arc down
6.Reuse the orbital missile projectile with a variation on it

A more advanced implementation could be:
Use a similar setup to the smaller rocket artillery - missiles fly across, tilt down and then accelerate really quickly, converting themselves into a new projectile like the rocket artillery.

Do whichever one is cooler. Or something along those lines!

This whole excercise is to solve the issue with it having a large time between individual muzzle shots, and also hitting mountains on the way, and also having a high muzzle velocity which we can control with the missile speed much easier.