Handle auto-save

[limenet]

Currently, a Pimcore autosave triggers an element refresh. This can be seen as both a bug and a feature. Solutions:

1. Introduce a Symfony Config option for assets / data objects / documents to disable that feature (default is enable for BC reasons)
2. Offer tagged interfaces with a supports strategy to provide custom logic

For simplicity reasons, option 1 will be implemented. If advanced logic is needed, a project can define a listener with a higher priority than what's defined in \Valantic\ElasticaBridgeBundle\EventListener\Pimcore\ChangeListener::getSubscribedEvents and call \Valantic\ElasticaBridgeBundle\EventListener\Pimcore\ChangeListener::disableListener.