Inject the attribute reader in place of the annotations reader when able

[mbabker]

The setAnnotationReader() method on the event listeners accepts either a Doctrine\Common\Annotations\Reader or a Gedmo\Mapping\Driver\AttributeReader, and after doctrine-extensions/DoctrineExtensions#2743 the attribute reader is (rightfully) no longer considered internal. The bundle should be updated to provide the attribute reader when appropriate to avoid relying on the library's feature detection (which will default to annotations if doctrine/annotations is installed, even if Symfony doesn't have an annotation_reader service).