Fix DanglingIndicesIT wait conditions (#55105)

Closes #55105

server/src/test/java/org/elasticsearch/indices/recovery/DanglingIndicesIT.java

@@ -77,7 +77,7 @@ public class DanglingIndicesIT extends ESIntegTestCase {
 
             @Override
             public Settings onNodeStopped(String nodeName) throws Exception {
-                ensureClusterSizeConsistency();
+                internalCluster().validateClusterFormed();
                 assertAcked(client().admin().indices().prepareDelete(INDEX_NAME));
                 return super.onNodeStopped(nodeName);
             }
@@ -108,7 +108,7 @@ public class DanglingIndicesIT extends ESIntegTestCase {
 
             @Override
             public Settings onNodeStopped(String nodeName) throws Exception {
-                ensureClusterSizeConsistency();
+                internalCluster().validateClusterFormed();
                 assertAcked(client().admin().indices().prepareDelete(INDEX_NAME));
                 return super.onNodeStopped(nodeName);
             }
@@ -138,7 +138,7 @@ public class DanglingIndicesIT extends ESIntegTestCase {
 
             @Override
             public Settings onNodeStopped(String nodeName) throws Exception {
-                ensureClusterSizeConsistency();
+                internalCluster().validateClusterFormed();
                 assertAcked(client().admin().indices().prepareDelete(INDEX_NAME));
                 return super.onNodeStopped(nodeName);
             }