[Fix] return when registerSendOrAckOp() failed (#1045)

Master Issue: #1040

### Motivation


fix #1040, return when registerSendOrAckOp() return an error.

### Modifications

- modified: pulsar/producer_partition.go

---------

Co-authored-by: gunli <gunli@tencent.com>

pulsar/producer_partition.go

@@ -1126,6 +1126,7 @@ func (p *partitionProducer) internalSendAsync(ctx context.Context, msg *Producer
 		}
 		if err := transactionImpl.registerSendOrAckOp(); err != nil {
 			runCallback(callback, nil, msg, err)
+			return
 		}
 		newCallback = func(id MessageID, producerMessage *ProducerMessage, err error) {
 			runCallback(callback, id, producerMessage, err)