Prepare 0.25.0 release

[veenstrajelmer]

Todo:

• make dfmt.open_dataset_extra() more modular #912
• Improve dfmt.interp_uds_to_plipoints() #911
• Undo the suppressing of xarray chunking warning #888
• Solve FutureWarning about delim_whitespace #919
• update examples now xugrid includes all meshkernel attributes #921
• Update minimal copernicusmarine version #920
• Update minimal copernicusmarine version again #936
• add deprecation error for dfmt.interp_regularnc_to_plipoints() #938
• fix test_ssh_retrieve_data[uhslc-fast] #940
• Disruptions and update to new cdsapi #739
• fix test_prevent_dtype_int #942
• refactor open_dataset_extra() #945
• re-enable contextily in modelbuilder notebook after fixing instable add_basemap #949
• suppress chunking warning again #947
• prevent inconsistent chunks error in xu.merge_partitions() xugrid#278
• cmems_nc_to_ini produces netcdf file incoherent depth variable #944
• Not all sigma layers are recognized #954
• check if refactor open_dataset_extra #946 impacts RdG, he uses ffill/bfill, now uses modelbuilder wrapper functions
• Consider removing failing preprocess_interpolate_nc_to_bc.py example script #905 (especially after refactor open_dataset_extra #946)
• remove escape for single partition #958
• flexible chunks again in dfmt.open_partitioned_dataset() #953
• test_prevent_dtype_int fails in mindeps github test #892

General:

• select more important issues
• check pytest warnings
• merge PR's
• run entire testbank
• update whatsnew

Follow-up: #962