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.
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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.