First implementation of GPU
First implementation of GPU on branch dev2022_GPU_merge. We target the numerical core (no sediment, no bio, no coupling, a,d so). Nearshore configuration (MRL_WCI, WKB_WWAVE) are also skipped for now.
Note that this branch includes some MPI dev to prepare inclusion of NBQ2
See https://gitlab.inria.fr/croco-ocean/croco/-/wikis/DEVS/GPU