Add unittest for spherical networks

[veenstrajelmer]

Kind of request

Adding new functionality

Enhancement Description

The current code mostly assumes cartesian/projected networks. There is a lot of conversion done between meshkernel objects, hydrolib-core network objects, xugrid object and netcdf files. This will probably go fine for cartesian, but for spherical/geographic networks there are a lot of things that can fail. Including whether interacter/FM reads the resulting network as spherical (via the epsg/grid_mapping attributes.

Additional checks are relevant for both spherical and cartesian:

• check if the crs is maintained throughout the process
• check if bathy is maintained/updated throughout the process (including mesh refinement)

Use case

Additional Context