Move velo bc to kernel manager

src/gpu/VirtualFluids_GPU/Calculation/UpdateGrid27.cpp

src/gpu/VirtualFluids_GPU/Calculation/UpdateGrid27.h

...rtualFluids_GPU/DataStructureInitializer/GridProvider.cpp

...tructureInitializer/GridReaderGenerator/GridGenerator.cpp

src/gpu/VirtualFluids_GPU/FindQ/DefineBCs.cpp

src/gpu/VirtualFluids_GPU/FindQ/FindQ.cpp

src/gpu/VirtualFluids_GPU/GPU/CudaKernelManager.cpp

src/gpu/VirtualFluids_GPU/GPU/CudaKernelManager.h

src/gpu/VirtualFluids_GPU/LBM/Simulation.cpp

src/gpu/VirtualFluids_GPU/Parameter/Parameter.cpp

src/gpu/VirtualFluids_GPU/Parameter/Parameter.h