RegistrationAccessControlHandler should rely on RegistratonHostEntityHandler to consider the validation for edit access

Problem/Motivation

In 📌 Replace HostEntity::isEnabledForRegistration Active we added this:

    if (($operation == 'update') && $result->isAllowed()) {
      $validation_result = $host_entity->isEditableRegistration($entity, $account, TRUE);
      $editable_result = AccessResult::allowedIf($validation_result->isValid())

Possibly this is better suited to the HostEntityHandler.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes