Use drupal_static() instead of setting dynamic property on $config in ConfigEventsSubscriber

Instead of setting a dynamic property on the config object, I'm wondering if we can use ConfigCrudEvent::isChanged.

ConfigEventsSubscriber::configSave modifies config and then saves it, which fires off another ConfigCrudEvent event. The purpose of $oembedProvidersProcessed is prevent an infinite loop. We need to figure out another way to check if ConfigEventsSubscriber::configSave has already acted on the config save.

On second thought, I bet we can leverage drupal_static() here. We should include the config object's name as part of the $name parameter to cover the case where multiple config objects are saved during the same request.

    $config_processed = &drupal_static(__METHOD__ . ':' . $config->getName());
...
    // Skip if the media config entity has already been processed.
    if (isset($config_processed) {
      return;
    }
...
        $config->setData($data);
        $config_processed = TRUE;
        $config->save();

Steps to reproduce:

1. Install Drupal 10 with PHP 8.2.
2. Install oEmbed Providers module.
3. Open the Media Type entity edit page (/admin/structure/media/manage/remote_video)for 'Remove video' and save the form.

Let's go ahead and scope this issue to this use of a dynamic property on an object. If there are additional PHP 8.2 issues, we can address those separately.

@PatriciaCB - Thanks for reporting this issue.

Automatically closed - issue fixed for 2 weeks with no activity.