Added turret rotation sounds to Tetrarch

Vertex colors update + several visual changes (some transparent materials might not render properly on the current beta branch) + Tetrarch QF2 reloaad from 2.5s to 3s

Tweaked Tetrarch sounds

Tweaked effects, tracers should be now compatible on MAC (tracers are properly rendered on Unity 2020 branch)

New effects (if these work properly all vehicles will be updated)

Created a new item.