[T] Rewritten VoxelGridFromLayers snakemake test to pytest.

Applications/Utils/Tests.cmake

Applications/Utils/VoxelGridFromLayers.smk

...Data/Utils/VoxelGridFromLayers/AREHS_2D_AABB_inverted.vtu

.../Data/Utils/VoxelGridFromLayers/AREHS_2D_AABB_regular.vtu

...Data/Utils/VoxelGridFromLayers/AREHS_3D_AABB_inverted.vtu

.../Data/Utils/VoxelGridFromLayers/AREHS_3D_AABB_regular.vtu

Tests/Data/Utils/VoxelGridFromLayers/AREHS_Layer0.vtu

Tests/Data/Utils/VoxelGridFromLayers/AREHS_Layer15.vtu

Tests/Data/Utils/VoxelGridFromLayers/AREHS_Layer17.vtu

Tests/Data/Utils/VoxelGridFromLayers/AREHS_Layer9.vtu

Tests/Data/Utils/VoxelGridFromLayers/AREHS_fault.vtu

Tests/Data/Utils/VoxelGridFromLayers/AREHS_test.vtu

Tests/Data/Utils/VoxelGridFromLayers/AREHS_test_fault.vtu

Tests/Data/Utils/VoxelGridFromLayers/AREHS_test_iso.vtu

Tests/Data/Utils/VoxelGridFromLayers/AREHS_test_layers.txt

...a/Utils/VoxelGridFromLayers/test_voxelgrid_from_layers.py