- renamed the mpi module to parallel
- removed the communicationRoutine interface from gpu. gpu now also uses the communicator interface from parallel
- added missing functionality in parallel/Communicator
- moved ws2_32 library dependency on windows from VirtualFluids_GPU to parallel

communicator was renamed in https://git.rz.tu-bs.de/irmb/VirtualFluids_dev/-/merge_requests/233

To be used in StressBC which gets improved results for q<0.5. q=0.5 still set as default argument for all other BCs

minor fixes