Use StoredFields in enrich lookup (#95756)

This PR replaces the deprecated API IndexSearcher#doc 
with the new StoredFields API.

x-pack/plugin/enrich/src/main/java/org/elasticsearch/xpack/enrich/action/EnrichShardMultiSearchAction.java

@@ -6,6 +6,7 @@
  */
 package org.elasticsearch.xpack.enrich.action;
 
+import org.apache.lucene.index.StoredFields;
 import org.apache.lucene.search.Query;
 import org.apache.lucene.search.ScoreDoc;
 import org.apache.lucene.search.Sort;
@@ -240,6 +241,7 @@ public class EnrichShardMultiSearchAction extends ActionType<MultiSearchResponse
                     throw new UnsupportedOperationException();
                 }, null, runtimeFields);
                 final MultiSearchResponse.Item[] items = new MultiSearchResponse.Item[request.multiSearchRequest.requests().size()];
+                StoredFields storedFields = searcher.storedFields();
                 for (int i = 0; i < request.multiSearchRequest.requests().size(); i++) {
                     final SearchSourceBuilder searchSourceBuilder = request.multiSearchRequest.requests().get(i).source();
 
@@ -255,9 +257,8 @@ public class EnrichShardMultiSearchAction extends ActionType<MultiSearchResponse
                     final SearchHit[] hits = new SearchHit[topDocs.scoreDocs.length];
                     for (int j = 0; j < topDocs.scoreDocs.length; j++) {
                         final ScoreDoc scoreDoc = topDocs.scoreDocs[j];
-
                         visitor.reset();
-                        searcher.doc(scoreDoc.doc, visitor);
+                        storedFields.document(scoreDoc.doc, visitor);
                         visitor.postProcess(field -> {
                             if (context.isFieldMapped(field) == false) {
                                 throw new IllegalStateException("Field [" + field + "] exists in the index but not in mappings");