Implement a graceful fallback check for when entities cannot be wrapped

First pass, let's see what the testbot thinks.

Let's see how we can test those PHP errors.

Oooops, some other code was in the way.

This should work now.

On second thought, we might want to drop the trigger_error to stop spamming the logs.

There is a legit use case to try to wrap an entity that has no repository.

function physical_media_node_access($node, $op, $account) {
  try {
    $wrapped_node = \Drupal::service(RepositoryManager::class)->wrap($node);
  }
  catch (RepositoryNotFoundException $exception) {
    return AccessResult::neutral();
  }
  return $wrapped_node instanceof AccessibleInterface
    ? $wrapped_node->access($op, $account, TRUE)
    : AccessResult::neutral();
}

In this case we want node types that have no associated wrapper to return access neutral. In 3.x the code should look like:

function physical_media_node_access($node, $op, $account) {
  $wrapped_node = typed_entity_repository_manager()->wrap($node);
  return $wrapped_node instanceof AccessibleInterface
    ? $wrapped_node->access($op, $account, TRUE)
    : AccessResult::neutral();
}

This drops the trigger_error and beautifies the code.

Merging and fixing the change record.