Use Drupal 9 compatible API.

Use Drupal 9 compatible API.

Use

$storage->create([$storage->getEntityType('id') => $plugin_id])

rather than just

$storage->create(['id' => $plugin_id]).

Applies patch from https://www.drupal.org/project/entity_print/issues/3231640#comment-14210763

Closes #3231640