[permissions] Enable permissionsV2 in seeds (#12623)

In this PR

- enable permissions V2 in seeds 
- remove permission V2 toggle in tests

packages/twenty-server/test/integration/graphql/utils/create-custom-role-with-object-permissions.util.ts

@@ -29,6 +29,9 @@ export const createCustomRoleWithObjectPermissions = async (options: {
   };
 
   const response = await makeGraphqlAPIRequest(createRoleOperation);
+
+  expect(response.body.errors).toBeUndefined();
+  expect(response.body.data.createOneRole).toBeDefined();
   const roleId = response.body.data.createOneRole.id;
 
   // Get object metadata IDs for Person and Company