[8.9] [ML] Unskips outlier creation functional tests (#164835)

## Summary

Unskips the outlier detection creation functional tests for 8.9 that
were skipped in
#142093 (comment).

The failing test on `8.9.2` was caused by the incomplete version bump
that was done in #164192, and
since rectified in #164230.

### Checklist

- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios

x-pack/test/functional/apps/ml/data_frame_analytics/outlier_detection_creation.ts

@@ -14,8 +14,7 @@ export default function ({ getService }: FtrProviderContext) {
   const ml = getService('ml');
   const editedDescription = 'Edited description';
 
-  // Failing: See https://github.com/elastic/kibana/issues/142093
-  describe.skip('outlier detection creation', function () {
+  describe('outlier detection creation', function () {
     before(async () => {
       await esArchiver.loadIfNeeded('x-pack/test/functional/es_archives/ml/ihp_outlier');
       await ml.testResources.createIndexPatternIfNeeded('ft_ihp_outlier');