Fix for RRF and RankDoc tests due to different shard and doc ordering (#114084)

Author: pmpailis

muted-tests.yml

@@ -351,9 +351,6 @@ tests:
 - class: org.elasticsearch.xpack.rank.rrf.RRFRetrieverBuilderIT
   method: testRRFWithCollapse
   issue: https://github.com/elastic/elasticsearch/issues/114074
-- class: org.elasticsearch.xpack.rank.rrf.RRFRetrieverBuilderIT
-  method: testMultipleRRFRetrievers
-  issue: https://github.com/elastic/elasticsearch/issues/114079
 - class: org.elasticsearch.xpack.inference.TextEmbeddingCrudIT
   method: testPutE5Small_withPlatformSpecificVariant
   issue: https://github.com/elastic/elasticsearch/issues/113950

server/src/internalClusterTest/java/org/elasticsearch/search/retriever/RankDocRetrieverBuilderIT.java

@@ -53,6 +53,7 @@
 import java.util.List;
 import java.util.Map;
 
+import static org.elasticsearch.cluster.metadata.IndexMetadata.SETTING_NUMBER_OF_REPLICAS;
 import static org.elasticsearch.cluster.metadata.IndexMetadata.SETTING_NUMBER_OF_SHARDS;
 import static org.hamcrest.Matchers.equalTo;
 
@@ -112,7 +113,7 @@ public void setup() throws Exception {
               }
             }
             """;
-        createIndex(INDEX, Settings.builder().put(SETTING_NUMBER_OF_SHARDS, 1).build());
+        createIndex(INDEX, Settings.builder().put(SETTING_NUMBER_OF_SHARDS, 1).put(SETTING_NUMBER_OF_REPLICAS, 0).build());
         admin().indices().preparePutMapping(INDEX).setSource(mapping, XContentType.JSON).get();
         indexDoc(
             INDEX,

x-pack/plugin/rank-rrf/src/internalClusterTest/java/org/elasticsearch/xpack/rank/rrf/RRFRetrieverBuilderIT.java

@@ -33,6 +33,7 @@
 import java.util.Collection;
 import java.util.List;
 
+import static org.elasticsearch.cluster.metadata.IndexMetadata.SETTING_NUMBER_OF_REPLICAS;
 import static org.elasticsearch.cluster.metadata.IndexMetadata.SETTING_NUMBER_OF_SHARDS;
 import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.equalTo;
@@ -97,7 +98,7 @@ protected void setupIndex() {
               }
             }
             """;
-        createIndex(INDEX, Settings.builder().put(SETTING_NUMBER_OF_SHARDS, 5).build());
+        createIndex(INDEX, Settings.builder().put(SETTING_NUMBER_OF_SHARDS, 1).put(SETTING_NUMBER_OF_REPLICAS, 0).build());
         admin().indices().preparePutMapping(INDEX).setSource(mapping, XContentType.JSON).get();
         indexDoc(INDEX, "doc_1", DOC_FIELD, "doc_1", TOPIC_FIELD, "technology", TEXT_FIELD, "term");
         indexDoc(
@@ -301,7 +302,7 @@ public void testRRFWithCollapse() {
         });
     }
 
-    public void testRankDocsRetrieverWithCollapseAndAggs() {
+    public void testRRFRetrieverWithCollapseAndAggs() {
         final int rankWindowSize = 100;
         final int rankConstant = 10;
         SearchSourceBuilder source = new SearchSourceBuilder();

x-pack/plugin/rank-rrf/src/internalClusterTest/java/org/elasticsearch/xpack/rank/rrf/RRFRetrieverBuilderNestedDocsIT.java

@@ -21,6 +21,7 @@
 
 import java.util.Arrays;
 
+import static org.elasticsearch.cluster.metadata.IndexMetadata.SETTING_NUMBER_OF_REPLICAS;
 import static org.elasticsearch.cluster.metadata.IndexMetadata.SETTING_NUMBER_OF_SHARDS;
 import static org.hamcrest.Matchers.equalTo;
 
@@ -67,7 +68,7 @@ protected void setupIndex() {
               }
             }
             """;
-        createIndex(INDEX, Settings.builder().put(SETTING_NUMBER_OF_SHARDS, 5).build());
+        createIndex(INDEX, Settings.builder().put(SETTING_NUMBER_OF_SHARDS, 1).put(SETTING_NUMBER_OF_REPLICAS, 0).build());
         admin().indices().preparePutMapping(INDEX).setSource(mapping, XContentType.JSON).get();
         indexDoc(INDEX, "doc_1", DOC_FIELD, "doc_1", TOPIC_FIELD, "technology", TEXT_FIELD, "term", LAST_30D_FIELD, 100);
         indexDoc(