(cherry picked from commit f931849c)

Fixed periodicity issue by addind STOPPER_OUT_OF_GRID_PERIODIC flag. Further preparaions for stress BC

(cherry picked from commit 07a4f9636751c016f7e73ff58b988da59f735921)

Fix various msvc compiler warnings. With msvc the compiler flags are explicit passed to nvcc with -Xcompiler.

Remove some compiler warnings and added some cuda warning suppressions for the GridGenerator, as they are cluttering the build output.

Warning: [-Wbackslash-newline-escape]
https://stackoverflow.com/questions/31673945/clang-backslash-and-newline-separated-by-space-in-single-line-comment

Renmade HOST in GridGenerator to CUDA_HOST because of a name conflict to MPI

Made VF_GPU work with the "new" cmake

implements a fix in the grid generator, that sets invalid STOPPER_UOT_OF_GRID_BOUNDARY nodes to INVALID_OUT_OF_GRID

the grids now store their number of layers, such that different refinements have different number of layers