Fix IndicesRequestIT.testIndicesStats (#137825)

Author: szybia

muted-tests.yml

@@ -426,9 +426,6 @@ tests:
 - class: org.elasticsearch.xpack.ilm.CCRIndexLifecycleIT
   method: testTsdbLeaderIndexRolloverAndSyncAfterWaitUntilEndTime {targetCluster=FOLLOWER}
   issue: https://github.com/elastic/elasticsearch/issues/137565
-- class: org.elasticsearch.action.IndicesRequestIT
-  method: testIndicesStats
-  issue: https://github.com/elastic/elasticsearch/issues/137594
 - class: org.elasticsearch.xpack.esql.vector.VectorSimilarityFunctionsIT
   method: testTopNSimilarityBetweenConstantVectorAndField {functionName=v_l2_norm
     similarityFunction=org.elasticsearch.xpack.esql.expression.function.vector.L2Norm$1@5b068087 elementType=byte}

server/src/internalClusterTest/java/org/elasticsearch/action/IndicesRequestIT.java

@@ -131,6 +131,7 @@ protected Settings nodeSettings(int ordinal, Settings otherSettings) {
             // InternalClusterInfoService sends IndicesStatsRequest periodically which messes with this test
             // this setting disables it...
             .put("cluster.routing.allocation.disk.threshold_enabled", false)
+            .put("cluster.routing.allocation.write_load_decider.enabled", "disabled")
             .build();
     }