refactor: support_skin ==> support_interface (CURA-2789)
refactor: support_skin ==> support_interface (CURA-2789)

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