Fix merge for 8.x

Author: carlosdelest

server/src/main/java/org/elasticsearch/search/vectors/RescoreKnnVectorQuery.java

@@ -57,7 +57,7 @@ public Query rewrite(IndexSearcher searcher) throws IOException {
 
         // Retrieve top k documents from the rescored query
         TopDocs topDocs = searcher.search(query, k);
-        vectorOperations = topDocs.totalHits.value();
+        vectorOperations = topDocs.totalHits.value;
         return new KnnScoreDocQuery(topDocs.scoreDocs, searcher.getIndexReader());
     }
 

server/src/test/java/org/elasticsearch/search/vectors/RescoreKnnVectorQueryTests.java

@@ -29,7 +29,7 @@
 import org.apache.lucene.search.TopDocs;
 import org.apache.lucene.search.Weight;
 import org.apache.lucene.store.Directory;
-import org.elasticsearch.index.codec.Elasticsearch900Lucene101Codec;
+import org.elasticsearch.index.codec.Elasticsearch816Codec;
 import org.elasticsearch.index.codec.vectors.ES813Int8FlatVectorFormat;
 import org.elasticsearch.index.codec.vectors.ES814HnswScalarQuantizedVectorsFormat;
 import org.elasticsearch.index.codec.vectors.es818.ES818BinaryQuantizedVectorsFormat;
@@ -211,7 +211,7 @@ private static void addRandomDocuments(int numDocs, Directory d, int numDims) th
             new ES813Int8FlatVectorFormat(),
             new ES814HnswScalarQuantizedVectorsFormat()
         );
-        iwc.setCodec(new Elasticsearch900Lucene101Codec(randomFrom(Zstd814StoredFieldsFormat.Mode.values())) {
+        iwc.setCodec(new Elasticsearch816Codec(randomFrom(Zstd814StoredFieldsFormat.Mode.values())) {
             @Override
             public KnnVectorsFormat getKnnVectorsFormatForField(String field) {
                 return format;