Backport transport constants related to #116339 (#116965)

This change was reverted with a new transport protocol in `main` so we
must backport the new protocol versions to `8.x`.

server/src/main/java/org/elasticsearch/TransportVersions.java

@@ -199,6 +199,8 @@ public class TransportVersions {
     public static final TransportVersion VERTEX_AI_INPUT_TYPE_ADDED = def(8_790_00_0);
     public static final TransportVersion SKIP_INNER_HITS_SEARCH_SOURCE = def(8_791_00_0);
     public static final TransportVersion QUERY_RULES_LIST_INCLUDES_TYPES = def(8_792_00_0);
+    public static final TransportVersion INDEX_STATS_ADDITIONAL_FIELDS = def(8_793_00_0);
+    public static final TransportVersion INDEX_STATS_ADDITIONAL_FIELDS_REVERT = def(8_794_00_0);
 
     /*
      * STOP! READ THIS FIRST! No, really,