[7.x][ML] Unmute testStopOutlierDetectionWithEnoughDocumentsToScroll (#46271) (#46282)

The test seems to have been failing due to a race condition between
stopping the task and refreshing the destination index. In particular,
we were going forward with refreshing the destination index even
though the task stopped in the meantime. This was fixed in
request.

Closes #43960

Backport of #46271

Author: dimitris-athanasiou

x-pack/plugin/ml/qa/native-multi-node-tests/src/test/java/org/elasticsearch/xpack/ml/integration/RunDataFrameAnalyticsIT.java

@@ -236,7 +236,6 @@ public void testOutlierDetectionWithMoreFieldsThanDocValueFieldLimit() throws Ex
         assertThat(searchStoredProgress(id).getHits().getTotalHits().value, equalTo(1L));
     }
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/43960")
     public void testStopOutlierDetectionWithEnoughDocumentsToScroll() {
         String sourceIndex = "test-stop-outlier-detection-with-enough-docs-to-scroll";