Add a static helper to create a host entity

Problem/Motivation

I wonder if it'd be neat to have a static helper to create a host entity:

public static function create(Entity interface $entity) {
 $handler = \Drupal::entityTypeManager()->getHander($entity->getEntityTypeId(), 'registration_host_entity');
  return $handler->createHostEntity($entity);
}

Remaining tasks

User interface changes

None

API changes

A new API method on HostEntity.

Data model changes

None.