4087 refactor object metadata item hooks and utils (#4861)

- Extracted each exported element from useObjectMetadataItem into its
own hook.

packages/twenty-front/src/modules/object-record/constants/EmptyMutation.ts

@@ -0,0 +1,7 @@
+import gql from 'graphql-tag';
+
+export const EMPTY_MUTATION = gql`
+  mutation EmptyMutation {
+    empty
+  }
+`;

packages/twenty-front/src/modules/object-record/constants/EmptyQuery.ts

@@ -0,0 +1,7 @@
+import gql from 'graphql-tag';
+
+export const EMPTY_QUERY = gql`
+  query EmptyQuery {
+    empty
+  }
+`;