ARTEMIS-5099 fix impossible cast in AMQPLargeMessage

I believe this was likely a copy-and-paste error involving
o.a.a.a.c.p.i.j.LargeServerMessageImpl#referenceOriginalMessage.

artemis-protocols/artemis-amqp-protocol/src/main/java/org/apache/activemq/artemis/protocol/amqp/broker/AMQPLargeMessage.java

@@ -660,7 +660,7 @@ public void referenceOriginalMessage(final Message original, final SimpleString
 
       super.referenceOriginalMessage(original, originalQueue);
 
-      if (original instanceof LargeServerMessageImpl) {
+      if (original instanceof AMQPLargeMessage) {
          this.largeBody.referenceOriginalMessage(((AMQPLargeMessage) original).largeBody);
       }
    }