Scarlett
Scarlett
Add support to the halo communication for sparse grids.
I had these tests failed on my local computer. ``` The following tests FAILED: 166 - Cajita_Halo2d_test_SERIAL_np_8 (Failed) 238 - Cajita_Halo2d_test_OPENMP_np_8 (Failed) 310 - Cajita_Halo2d_test_CUDA_np_8 (Failed) 382 - Cajita_Halo2d_test_CUDA_UVM_np_8 (Failed)...