Remove useless const aliases for variable names
Remove useless const aliases for variable names

Many of these are just because it starts with support_, which is completely unnecessary since the class is named support so it should always be about support. In fact, let's remove the rest of those now.

Contributes to issue CURA-4523.

Ultimaker/CuraEngine,alephobjects/CuraEngine,ROBO3D/CuraEngine,alephobjects/CuraEngine,alephobjects/CuraEngine,ROBO3D/CuraEngine,ROBO3D/CuraEngine,Ultimaker/CuraEngine