Move DrafLift into Calculation.

...ore/BoundaryConditions/BoundaryConditionKernelManager.cpp

src/gpu/core/Calculation/DragLift.cpp

src/gpu/core/Calculation/DragLift.cu

src/gpu/core/Calculation/DragLift.cuh

src/gpu/core/Calculation/DragLift.h

src/gpu/core/GPU/GPU_Interface.h

src/gpu/core/GPU/GPU_Kernels.cuh

src/gpu/core/GPU/LBMKernel.cu