### 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_
store = SnsProvider.get_store()
    if topic_arn not in store.sns_tags:
        store.sns_tags[topic_arn] = []
    return store.sns_tags[topic_arn]
def is_raw_message_delivery(susbcriber):
    return susbcriber.get("RawMessageDelivery") in ("true", True, "True")
def validate_subscription_attribute(
    attribute_name: str, attribute_value: str, topic_arn: str
) -> None:
    """
    Validate the subscription attribute to be set. See:
    https://docs.aws.amazon.com/sns/latest/api/API_SetSubscriptionAttributes.html
    :param attribute_name: the subscription attribute name, must be in VALID_SUBSCRIPTION_ATTR_NAME
    :param attribute_value: the subscription attribute value
    :param topic_arn: the topic_arn of the subscription, needed to know if it is FIFO
    :raises InvalidParameterException
    :return:
    """
    if attribute_name not in sns_constants.VALID_SUBSCRIPTION_ATTR_NAME:
        raise InvalidParameterException("Invalid parameter: AttributeName")
    if attribute_name == "FilterPolicy":
        try:
            json.loads(attribute_value or "{}")
        except json.JSONDecodeError:
            raise InvalidParameterException(
                "Invalid parameter: FilterPolicy: failed to parse JSON."
            )
    elif attribute_name == "FilterPolicyScope":
        if attribute_value not in ("MessageAttributes", "MessageBody"):