[TEST] Fix typo in MovAvgIT test

The second set of assertions was accidentally using the count's
moving average for the error delta in the value's moving average
assertion.  This fixes the typo, and unmutes the test.

Closes #29456

server/src/test/java/org/elasticsearch/search/aggregations/pipeline/moving/avg/MovAvgIT.java

@@ -19,9 +19,7 @@
 
 package org.elasticsearch.search.aggregations.pipeline.moving.avg;
 
-import org.apache.lucene.util.LuceneTestCase;
 import org.elasticsearch.action.bulk.BulkRequestBuilder;
-import org.elasticsearch.action.bulk.BulkResponse;
 import org.elasticsearch.action.index.IndexRequestBuilder;
 import org.elasticsearch.action.search.SearchPhaseExecutionException;
 import org.elasticsearch.action.search.SearchResponse;
@@ -45,7 +43,6 @@ import org.elasticsearch.search.aggregations.support.ValuesSourceAggregationBuil
 import org.elasticsearch.test.ESIntegTestCase;
 import org.hamcrest.Matchers;
 
-import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
@@ -69,7 +66,6 @@ import static org.hamcrest.core.IsNull.notNullValue;
 import static org.hamcrest.core.IsNull.nullValue;
 
 @ESIntegTestCase.SuiteScopeTestCase
-@LuceneTestCase.AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/29456")
 public class MovAvgIT extends ESIntegTestCase {
     private static final String INTERVAL_FIELD = "l_value";
     private static final String VALUE_FIELD = "v_value";
@@ -1308,7 +1304,7 @@ public class MovAvgIT extends ESIntegTestCase {
         } else {
             assertThat("[value] movavg is null", valuesMovAvg, notNullValue());
             assertEquals("[value] movavg does not match expected [" + valuesMovAvg.value() + " vs " + expectedValue + "]",
-                    valuesMovAvg.value(), expectedValue, 0.1 * Math.abs(countMovAvg.value()));
+                    valuesMovAvg.value(), expectedValue, 0.1 * Math.abs(valuesMovAvg.value()));
         }
     }