[GPU] move GridScaling functionality into gpu/core/GridScaling

apps/gpu/ActuatorLine/ActuatorLine.cpp

apps/gpu/ActuatorLineRegression/ActuatorLineRegression.cpp

apps/gpu/BoundaryLayer/BoundaryLayer.cpp

apps/gpu/DrivenCavity/DrivenCavity.cpp

apps/gpu/DrivenCavityMultiGPU/DrivenCavityMultiGPU.cpp

apps/gpu/DrivenCavityUniform/DrivenCavity.cpp

apps/gpu/SphereGPU/Sphere.cpp

apps/gpu/SphereRefined/SphereRefined.cpp

apps/gpu/SphereScaling/SphereScaling.cpp

apps/gpu/TGV_3D_GridRef/TGV_3D_GridRef.cpp

pythonbindings/src/gpu/submodules/simulation.cpp

src/gpu/core/Calculation/UpdateGrid27.cpp

src/gpu/core/GridScaling/GridScalingFactory.cpp

src/gpu/core/GridScaling/GridScalingFactory.h

src/gpu/core/GridScaling/GridScalingKernelManager.cpp

src/gpu/core/GridScaling/GridScalingKernelManager.h

src/gpu/core/GridScaling/GridScalingKernelManagerTest.cpp

src/gpu/core/GridScaling/ScaleCF27.cu

src/gpu/core/GridScaling/ScaleCF_F3_27.cu

src/gpu/core/GridScaling/ScaleFC27.cu