### 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_
)
        sub_attrs = sns_client.get_subscription_attributes(SubscriptionArn=subscription_arn)
        snapshot.match("subscriptions-attrs-with-redrive", sub_attrs)
        # A
        assert poll_condition(lambda: not sqs_queue_exists(queue_url), timeout=5)
        # t
        for i in range(2):
            message = f"test_dlq_after_sqs_endpoint_deleted_{i}"
            sns_client.publish(TopicArn=topic_arn, Message=message)
            response = sqs_client.receive_message(
                QueueUrl=dlq_url, WaitTimeSeconds=10, MaxNumberOfMessages=4
            )
            sqs_client.delete_message(
                QueueUrl=dlq_url, ReceiptHandle=response["Messages"][0]["ReceiptHandle"]
            )
            snapshot.match(f"message-{i}-after-delete", response)
    @pytest.mark.aws_validated
    def test_publish_to_firehose_with_s3(
        self,
        s3_client,
        iam_client,
        firehose_client,
        sns_client,
        create_role,
        s3_create_bucket,
        firehose_create_delivery_stream,
        sns_create_topic,
        sns_subscription,
    ):
        role_name = f"test-role-{short_uid()}"