Use level instead of dridNumber in NodeIndicesMultiGPU
and instead of i in loops in MultipleGridBuilder

CUDA doesn't support std::vector

No need to pass node types anymore

As the cuda warnings are different on each platform and super badly documented, we switch to suppress all warnings for the GridGenerator.

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.

Exchange DEPENDS (which links everything private) variable with PUBLIC_LINK and PRIVATE_LINK. Therefore VirtualFluidsCPU is linking everything public know. Everything else is still linking private.

Remove VirtualFluidsDefinitions.h header file.
Remove redundant compiler definitions from gpu.cmake.