Call extracted method computeSlicingEffects in other form factors

Core/HardParticle/FormFactorCone.cpp

Core/HardParticle/FormFactorCylinder.cpp

Core/HardParticle/FormFactorEllipsoidalCylinder.cpp

Core/HardParticle/FormFactorFullSphere.cpp

Core/HardParticle/FormFactorFullSpheroid.cpp

Core/HardParticle/FormFactorPrism3.cpp

Core/HardParticle/FormFactorPrism6.cpp

Core/HardParticle/FormFactorTruncatedSphere.cpp

Core/HardParticle/FormFactorTruncatedSpheroid.cpp