Enable `assumeImmutableResults` on the CI Minutes Usage Quota

This commit solves https://gitlab.com/gitlab-org/gitlab/-/issues/338561
It enables `assumeImmutableResults` on the CI Minutes Usage Quota.

ee/app/assets/javascripts/ci_minutes_usage/index.js

@@ -7,8 +7,7 @@ import CiMinutesUsageApp from './components/app.vue';
 const mountCiMinutesUsageApp = (el) => {
   Vue.use(VueApollo);
 
-  const defaultClient = createDefaultClient();
-
+  const defaultClient = createDefaultClient({}, { assumeImmutableResults: true });
   const apolloProvider = new VueApollo({
     defaultClient,
   });