Fix (hack) regression ('query_builder not found') introduced by PR EasyCorp#3551

See EasyCorp#4229 :
If the AssociationType is used with a FormType that doesn't have a query_builder option,
Symfony will complain.

As for now, it is just a hack, I suppose there may be a better way to do that.
That's why I voluntarily kept the FQCN during the discussion.

Author: Yopai

src/Field/Configurator/AssociationConfigurator.php

@@ -84,7 +84,7 @@ public function configure(FieldDto $field, EntityDto $entityDto, AdminContext $c
                 ->generateUrl();
 
             $field->setFormTypeOption('attr.data-ea-autocomplete-endpoint-url', $autocompleteEndpointUrl);
-        } else {
+        } else if ($field->getFormType() instanceof \Symfony\Bridge\Doctrine\Form\Type) {
             $field->setFormTypeOptionIfNotSet('query_builder', static function (EntityRepository $repository) use ($field) {
                 // TODO: should this use `createIndexQueryBuilder` instead, so we get the default ordering etc.?
                 // it would then be identical to the one used in autocomplete action, but it is a bit complex getting it in here