Query in \Drupal\entity_usage_updater\EntityUsageUpdater::getHostEntities() is broken on large sites

As this is a refactor and only occurs on large sites this in not really testable by adding new tests. We already have test coverage of the paragraph updating functionality so at least we can be sure we've not broken that.

Tested this on a multiple entities on a large site. It works well. Before this change it would just hang. As above only manual t4ests are possible here really.