Issue #3400265: Users with `edit [collection.type] collection` can't add existing items to a collection

- Remove unused use statements
- Remove unused 'status' key
- Remove unnecessary setTranslatable() method on status field

This fixes a bug for entities that have other fields using the IEF widget.

Issue #3333098 by jeffam, a-fro: Allow Collection entities to indicate if they can be collected in other collections

Co-authored-by: Jeff Amaral <jeff.amaral@cornell.edu>

Issue #3198958 by jeffam, a-fro: Allow setting the preferred collection item type for a given content entity type, bundle, and collection type

This moves inline collection item editing into a pseudo/extra field.

This can allow other modules to add an orderBy or otherwise modify the query.

This should only be used if the content_moderation module is enabled, and will force revisions for moderated collections.

Co-authored-by: Aaron Froehlich <aaronfroehlich@gmail.com>