Remove code duplication of the Chimera transformations

The chimera transformation functions are implemented multiple times:

• in src/gpu/VirtualFluids_GPU/LBM/GPUHelperFunctions/ChimeraTransformation.h
• in src/lbm/CumulantChimera.h
• in src/cpu/VirtualFluidsCore/LBM/CumulantK17LBMKernel.h

I think we should use src/lbm/CumulantChimera.h everywhere and remove the other implementations.