Revert "Mute ML upgrade test (#30458)"

This reverts commit 4b36ea74334e2664412af3540a64b82e0845e710.

x-pack/qa/rolling-upgrade/src/test/java/org/elasticsearch/upgrades/UpgradeClusterClientYamlTestSuiteIT.java

@@ -8,7 +8,6 @@ package org.elasticsearch.upgrades;
 import com.carrotsearch.randomizedtesting.annotations.ParametersFactory;
 import com.carrotsearch.randomizedtesting.annotations.TimeoutSuite;
 
-import org.apache.lucene.util.LuceneTestCase;
 import org.apache.lucene.util.TimeUnits;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.util.concurrent.ThreadContext;
@@ -30,7 +29,6 @@ import static java.util.Collections.singletonMap;
 import static org.hamcrest.Matchers.is;
 
 @TimeoutSuite(millis = 5 * TimeUnits.MINUTE) // to account for slow as hell VMs
-@LuceneTestCase.AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/30456")
 public class UpgradeClusterClientYamlTestSuiteIT extends ESClientYamlSuiteTestCase {
 
     /**