fix(graphql): increment graphql normalizer priority (#6283)

* fix(graphql): increment graphql normalizer priority

closes #6279 #6264

* improve behat test

Author: soyuka

features/openapi/docs.feature

@@ -396,38 +396,27 @@ Feature: Documentation support
     Then the response status code should be 200
     And the response should be in JSON
     And the JSON node "openapi" should be equal to "3.0.0"
-    And the JSON node "components.schemas.DummyBoolean" should be equal to:
+    And the JSON node "components.schemas.DummyBoolean.properties.id.anyOf" should be equal to:
     """
-    {
-      "type": "object",
-      "description": "",
-      "deprecated": false,
-      "properties": {
-        "id": {
-          "readOnly": true,
-          "anyOf": [
-            {
-              "type": "integer"
-            },
-            {
-              "type": "null"
-            }
-          ]
-        },
-        "isDummyBoolean": {
-          "anyOf": [
-            {
-              "type": "boolean"
-            },
-            {
-              "type": "null"
-            }
-          ]
-        },
-        "dummyBoolean": {
-          "readOnly": true,
-          "type": "boolean"
-        }
+    [
+      {
+        "type": "integer"
+      },
+      {
+        "type": "null"
       }
-    }
+    ]
+    """
+    And the JSON node "components.schemas.DummyBoolean.properties.isDummyBoolean.anyOf" should be equal to:
     """
+     [
+      {
+        "type": "boolean"
+      },
+      {
+        "type": "null"
+      }
+    ]
+    """
+    And the JSON node "components.schemas.DummyBoolean.properties.isDummyBoolean.owl:maxCardinality" should not exist
+

src/Symfony/Bundle/Resources/config/graphql.xml

@@ -213,8 +213,8 @@
             <argument type="service" id="api_platform.metadata.resource.metadata_collection_factory" on-invalid="ignore" />
             <argument type="service" id="api_platform.security.resource_access_checker" on-invalid="ignore" />
 
-            <!-- Run before serializer.normalizer.json_serializable -->
-            <tag name="serializer.normalizer" priority="-890" />
+            <!-- Run before serializer.normalizer.json_serializable and before serializer.normalizer.backed_enum which is at 880 -->
+            <tag name="serializer.normalizer" priority="-878" />
         </service>
 
         <service id="api_platform.graphql.normalizer.object" class="ApiPlatform\GraphQl\Serializer\ObjectNormalizer" public="false">