Support Diff : Add diff builder plugin

Problem/Motivation

Here is the error while working with Diff module.

Fatal error: Declaration of Drupal\dynamic_entity_reference\Plugin\diff\Field\DynamicEntityReferenceFieldBuilder::build(Drupal\Core\Field\FieldItemListInterface $field_items) must be compatible with Drupal\diff\Plugin\diff\Field\EntityReferenceFieldBuilder::build(Drupal\Core\Field\FieldItemListInterface $field_items): array in /var/www/html/d10site/web/modules/contrib/dynamic_entity_reference/src/Plugin/diff/Field/DynamicEntityReferenceFieldBuilder.php on line 25