web: adopt Cache Components, Partial Prefetching and ensureStatic

web/tests/smoke/global-setup.ts

@@ -79,6 +79,8 @@ export default async function setup(project: TestProject) {
     );
   });
 
+  mock.markBuildDone();
+
   if (mock.graphqlRequests === 0) {
     throw new Error(
       "next build made no GraphQL requests to the mock CMS — is WAGTAIL_BASE_URL being overridden?"