Migrate clean_grid and entity_extraction filters
First pass of migrating Entity Extraction filters to the new filter API. Addresses #601 (closed) and https://gitlab.kitware.com/kmorel/ecp-vtk-m-project-management/-/issues/328.
First pass of migrating Entity Extraction filters to the new filter API. Addresses #601 (closed) and https://gitlab.kitware.com/kmorel/ecp-vtk-m-project-management/-/issues/328.