fix(api): stop returning 204 with response body and add CI check (#36489)

api/tests/unit_tests/controllers/console/explore/test_installed_app.py

@@ -327,7 +327,7 @@ class TestInstalledAppApi:
             resp, status = method(installed_app)
 
         assert status == 204
-        assert resp["result"] == "success"
+        assert resp == ""
 
     def test_delete_owned_by_current_tenant(self, tenant_id: str):
         api = module.InstalledAppApi()

api/tests/unit_tests/controllers/console/explore/test_saved_message.py

@@ -141,7 +141,7 @@ class TestSavedMessageApi:
 
         delete_mock.assert_called_once()
         assert status == 204
-        assert result == {"result": "success"}
+        assert result == ""
 
     def test_delete_not_completion_app(self):
         api = module.SavedMessageApi()