fix(client): get jquery from cdn (#44421)

* fix: ensures jquery exists for those challenges

For tests frame-runner.js imports jquery, but jquery challenges always
need it

* Revert "Revert "fix: only include frame-runner when running tests (#44337)" (#44419)"

This reverts commit c19bf504b8.

curriculum/test/test-challenges.js

@@ -577,11 +577,14 @@ async function createTestRunner(
     solutionFiles
   );
 
-  const { build, sources, loadEnzyme } = await buildChallenge({
-    challengeFiles,
-    required,
-    template
-  });
+  const { build, sources, loadEnzyme } = await buildChallenge(
+    {
+      challengeFiles,
+      required,
+      template
+    },
+    { usesTestRunner: true }
+  );
 
   const code = {
     contents: sources.index,