Fix CCSDuelIT for skipped shards (#79490)

Closes #79365

Author: ywelsch

qa/multi-cluster-search/src/test/java/org/elasticsearch/search/CCSDuelIT.java

@@ -103,6 +103,7 @@
 import static org.hamcrest.Matchers.empty;
 import static org.hamcrest.Matchers.greaterThan;
 import static org.hamcrest.Matchers.greaterThanOrEqualTo;
+import static org.hamcrest.Matchers.lessThanOrEqualTo;
 import static org.hamcrest.Matchers.not;
 
 /**
@@ -438,7 +439,6 @@ public void testSortByFieldOneClusterHasNoResults() throws Exception {
         assumeMultiClusterSetup();
         SearchRequest searchRequest = initSearchRequest();
         // set to a value greater than the number of shards to avoid differences due to the skipping of shards
-        searchRequest.setPreFilterShardSize(128);
         SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
         boolean onlyRemote = randomBoolean();
         sourceBuilder.query(new TermQueryBuilder("_index", onlyRemote ? REMOTE_INDEX_NAME : INDEX_NAME));
@@ -461,7 +461,6 @@ public void testSortByFieldOneClusterHasNoResults() throws Exception {
         });
     }
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/79365")
     public void testFieldCollapsingOneClusterHasNoResults() throws Exception {
         assumeMultiClusterSetup();
         SearchRequest searchRequest = initSearchRequest();
@@ -771,6 +770,7 @@ private static void duelSearch(SearchRequest searchRequest, Consumer<SearchRespo
                 message.compareMaps(minimizeRoundtripsResponseMap, fanOutResponseMap);
                 throw new AssertionError("Didn't match expected value:\n" + message);
             }
+            assertThat(minimizeRoundtripsSearchResponse.getSkippedShards(), lessThanOrEqualTo(fanOutSearchResponse.getSkippedShards()));
         }
     }
 
@@ -835,6 +835,10 @@ private static Map<String, Object> responseToMap(SearchResponse response) throws
                 shard.remove("fetch");
             }
         }
+        Map<String, Object> shards = (Map<String, Object>)responseMap.get("_shards");
+        if (shards != null) {
+            shards.remove("skipped");
+        }
         return responseMap;
     }