### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

I am running an SNS topic that publishes to a lambda function. The localstack code reads a type byte object from the lambda function invocation payload [here](https://github.com/localstack/localstack/blob/master/localstack/services/sns/publisher.py#L187) and then tries to dump the result into json [here](https://github.com/localstack/localstack/blob/master/localstack/services/sns/publisher.py#L863) which results in the following error:
```
sns_pub_0] l.services.sns.publisher   : Unable to run Lambda function on SNS message: Object of type bytes is not JSON serializable
```

### Expected Behavior

The payload bytes should be converted to a string before being dumped to json. The error should not be thrown.

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

#### How are you starting localstack (e.g., `bin/localstack` command, arguments, or `docker-compose.yml`)

docker-compose up
(Using the standard docker-compose.yaml)

#### Client commands (e.g., AWS SDK code snippet, or sequence of "awslocal" commands)

```
awslocal sns publish --message file://sns/message.json --topic-arn arn:aws:sns:us-east-1:000000000000:<topic_name>
```

### Environment

```markdown
- OS: macOS Ventura 13.2.1
- LocalStack: latest
```


### Anything else?

_No response_
kwargs["MessageDeduplicationId"] = message_context.message_deduplication_id
            elif queue_url.endswith(".fifo"):
                
                
                
                content = context.message.message_content("sqs")
                kwargs["MessageDeduplicationId"] = hashlib.sha256(
                    content.encode("utf-8")
                ).hexdigest()
            sqs_client.send_message(
                QueueUrl=queue_url,
                MessageBody=message_body,
                MessageAttributes=sqs_message_attrs,
                MessageSystemAttributes=create_sqs_system_attributes(context.request_headers),
                **kwargs,
            )
            store_delivery_log(message_context, subscriber, success=True)
        except Exception as exc:
            LOG.info("Unable to forward SNS message to SQS: %s %s", exc, traceback.format_exc())
            store_delivery_log(message_context, subscriber, success=False)
            sns_error_to_dead_letter_queue(
                subscriber, message_body, str(exc), msg_attrs=sqs_message_attrs
            )
            if "NonExistentQueue" in str(exc):
                LOG.debug("The SQS queue endpoint does not exist anymore")
                
                
                
    @staticmethod
    def create_sqs_message_attributes(