Fix users having access to the layout builder on entities regardless of whether the layout is enabled

Note that normal users who don't have access to the layout builder manage or edit won't have access.
The problem is that the layout builder is enabled without actually being enabled.

Not sure, if this issue should be marked as Moderately critical

rajab natshah → changed the visibility of the branch 3471460-fix-users-having-access to hidden.

Remove handleTranslationAccess since it disables the layout builder on translations.

  protected function handleTranslationAccess(AccessResult $result, $operation, AccountInterface $account) {
    $entity = $this->getEntity();
    // Access is always denied on non-default translations.
    return $result->andIf(AccessResult::allowedIf(!($entity instanceof TranslatableInterface && !$entity->isDefaultTranslation())))->addCacheableDependency($entity);
  }

Got that, testing