### 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_
:raises: InvalidParameterValueException
    :return: None
    """
    for attr_name, attr in message_attributes.items():
        if len(attr_name) > 256:
            raise InvalidParameterValueException(
                "Length of message attribute name must be less than 256 bytes."
            )
        validate_message_attribute_name(attr_name)
        
        data_type = attr["DataType"]
        if data_type not in (
            "String",
            "Number",
            "Binary",
        ) and not sns_constants.ATTR_TYPE_REGEX.match(data_type):
            raise InvalidParameterValueException(
                f"The message attribute '{attr_name}' has an invalid message attribute type, the set of supported type prefixes is Binary, Number, and String."
            )
        value_key_data_type = "Binary" if data_type.startswith("Binary") else "String"
        value_key = f"{value_key_data_type}Value"
        if value_key not in attr:
            raise InvalidParameterValueException(
                f"The message attribute '{attr_name}' with type '{data_type}' must use field '{value_key_data_type}'."
            )
        elif not attr[value_key]:
            raise InvalidParameterValueException(
                f"The message attribute '{attr_name}' must contain non-empty message attribute value for message attribute type '{data_type}'.",
            )
def validate_message_attribute_name(name: str) -> None: