[Bug] - Modflow6Simulation.dump doesn't work when HFB package is added

[JoerivanEngelen]

Bug description
There is a misalignment between Modflow6Simulation.dump and Package.to_netcdf
The dump method should call the Package.to_netcdf method, however it now features its own custom logic to deal with UGRID data and MDAL prepared data, which should be moved Package.to_netcdf.

This is especially a problem for HorizontalFlowBarrierBase.to_netcdf, as this features specific logic which is a hard requirement to even succesfully save to netcdf.

Steps to reproduce
See #1322

Desktop (please complete the following information):

• OS: Windows 11
• iMOD Python Version: 0.18.1 dev