Avoid using concurrent collector manager in LuceneChangesSnapshot (elastic#113816)

The searcher never gets an executor set, then we can save the overhead of the
concurrent collector manager / collectors.

Author: javanna

docs/changelog/113816.yaml

@@ -0,0 +1,5 @@
+pr: 113816
+summary: Avoid using concurrent collector manager in `LuceneChangesSnapshot`
+area: Search
+type: enhancement
+issues: []

server/src/main/java/org/elasticsearch/index/engine/LuceneChangesSnapshot.java

@@ -301,7 +301,8 @@ private TopDocs searchOperations(FieldDoc after, boolean accurateTotalHits) thro
             new Sort(sortBySeqNo),
             searchBatchSize,
             after,
-            accurateTotalHits ? Integer.MAX_VALUE : 0
+            accurateTotalHits ? Integer.MAX_VALUE : 0,
+            false
         );
         return indexSearcher.search(rangeQuery, topFieldCollectorManager);
     }