Destruction lists items without zaak cause AttributeError [Backend]

[SilviaAmAm]

Sentry: maykin-media/issues/384741

AttributeError: 'NoneType' object has no attribute 'url'
  File "celery/app/trace.py", line 736, in __protected_call__
    return self.run(*args, **kwargs)
  File "openarchiefbeheer/destruction/tasks.py", line 48, in process_review_response
    prepopulate_selection_after_review_response(
  File "openarchiefbeheer/destruction/utils.py", line 315, in prepopulate_selection_after_review_response
    zaak_url=item.zaak.url,

This can happen if a zaak has been removed in Openzaak and then the zaken are resynced in OAB.
The destruction list item has then no zaak attached to it.

To discuss:

• Do we want to remove the item from the destruction list? If yes, should there be an automatic log that says "The new list count is X zaken"?

Answer from PO: delete the zaak and add a log in the history tab that a zaak was deleted (and so the total number of zaken in the list is changed)