Revert "skip flaky suite (#183064)" (#183152)

This reverts commit eea06fc.

Fixes #183064

## Summary

Tests were failing due to a transient service interruption in Elastic
Maps Service. The service was restored after a couple of minutes, so we
should be able to re-enable these tests.

x-pack/test/functional/apps/dashboard/group2/_async_dashboard.ts

@@ -29,8 +29,7 @@ export default function ({ getService, getPageObjects }: FtrProviderContext) {
     'timePicker',
   ]);
 
-  // FLAKY: https://github.com/elastic/kibana/issues/183064
-  describe.skip('sample data dashboard', function describeIndexTests() {
+  describe('sample data dashboard', function describeIndexTests() {
     before(async () => {
       await esArchiver.emptyKibanaIndex();
       await PageObjects.common.sleep(5000);