### 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_
request.headers[
                "X-Amzn-Trace-Id"
            ] = "Root=1-3152b799-8954dae64eda91bc9a23a7e8;Parent=7fa8c0f79203be72;Sampled=1"
        try:
            sns_client.meta.events.register("before-send.sns.Publish", add_xray_header)
            topic = sns_create_topic()
            topic_arn = topic["TopicArn"]
            queue_url = sqs_create_queue()
            sns_create_s(topic_arn=topic_arn, queue_url=queue_url)
            sns_client.publish(TargetArn=topic_arn, Message="X-Ray propagation test msg")
            response = sqs_client.receive_message(
                QueueUrl=queue_url,
                AttributeNames=["SentTimestamp", "AWSTraceHeader"],
                MaxNumberOfMessages=1,
                MessageAttributeNames=["All"],
                VisibilityTimeout=2,
                WaitTimeSeconds=2,
            )
            assert len(response["Messages"]) == 1
            message = response["Messages"][0]
            snapshot.match("xray-msg", message)
            assert (
                message["Attributes"]["AWSTraceHeader"]
                == "Root=1-3152b799-8954dae64eda91bc9a23a7e8;Parent=7fa8c0f79203be72;Sampled=1"
            )
        finally:
            sns_client.meta.events.unregister("before-send.sns.Publish", add_xray_header)
    @pytest.mark.aws_validated
    def test_create_topic_after_delete_with_new_tags(self, sns_create_topic, sns_client, snapshot):