deletet all gpu related files, changed alle .cu files to .cpp files and add the licence text where it was still missing

Remove boost dependency from cmake, supress cuda warnings in gridgenerator and add new CUDA_ARCHITECTURE to msvc CI job.

Remove further compiler warnings and enables ci job which builds VirtualFluids with warning as errors.

As the gks meshadapter includes files from the gridgenerator, which includes cuda we need to link cuda here too.