Fix serialization of StreamsMetadata (elastic#142171) (elastic#142177)

Accidentally introduced in elastic#141564 during a refactor,
this fixes the serialization issue for older versions.

Co-authored-by: Lee Hinman <dakrone@users.noreply.github.com>

Author: bcully

server/src/main/java/org/elasticsearch/cluster/metadata/StreamsMetadata.java

@@ -120,8 +120,10 @@ public static NamedDiff<Metadata.ProjectCustom> readDiffFrom(StreamInput in) thr
     @Override
     public void writeTo(StreamOutput out) throws IOException {
         out.writeBoolean(logsEnabled);
-        out.writeBoolean(logsECSEnabled);
-        out.writeBoolean(logsOTelEnabled);
+        if (out.getTransportVersion().supports(STREAM_SPLIT_VERSION)) {
+            out.writeBoolean(logsECSEnabled);
+            out.writeBoolean(logsOTelEnabled);
+        }
     }
 
     @Override