fix serialization

Author: idegtiarenko

x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/operator/DriverCompletionInfo.java

@@ -105,7 +105,9 @@ public void writeTo(StreamOutput out) throws IOException {
         out.writeVLong(documentsFound);
         out.writeVLong(valuesLoaded);
         out.writeCollection(driverProfiles);
-        out.writeCollection(planProfiles);
+        if (out.getTransportVersion().onOrAfter(TransportVersions.ESQL_PROFILE_INCLUDE_PLAN)) {
+            out.writeCollection(planProfiles);
+        }
     }
 
     public static class Accumulator {