Move advection diffusion kernels to ADKernelManager

.../VirtualFluids_GPU/AdvectionDiffusion/ADKernelManager.cpp

...pu/VirtualFluids_GPU/AdvectionDiffusion/ADKernelManager.h

...rtualFluids_GPU/AdvectionDiffusion/AdvectionDiffusion.cpp

src/gpu/VirtualFluids_GPU/Calculation/UpdateGrid27.cpp

src/gpu/VirtualFluids_GPU/Calculation/UpdateGrid27.h

src/gpu/VirtualFluids_GPU/GPU/LBKernelManager.cpp

src/gpu/VirtualFluids_GPU/GPU/LBKernelManager.h