zjsunit: Do not run $(...) automatically.

We have generally gone away from using $(...)
initialization in modules that we test with
zjsunit, but there are a few remaining special
cases related to our billing and portico
codebases.

frontend_tests/node_tests/stream_edit.js

@@ -8,7 +8,7 @@ const {run_test} = require("../zjsunit/test");
 const $ = require("../zjsunit/zjquery");
 
 const noop = () => {};
-stub_templates(() => noop);
+stub_templates(() => "<stub>");
 
 const page_params = set_global("page_params", {});
 mock_cjs("jquery", $);