### 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_
f"Invalid parameter: PhoneNumber Reason: {phone_number} is not valid to publish to"
            )
        if len(message) > MAXIMUM_MESSAGE_LENGTH:
            raise InvalidParameterException("Invalid parameter: Message too long")
        
        
        topic_or_target_arn = topic_arn or target_arn
        if topic_or_target_arn and ".fifo" in topic_or_target_arn:
            if not message_group_id:
                raise InvalidParameterException(
                    "Invalid parameter: The MessageGroupId parameter is required for FIFO topics",
                )
            moto_sns_backend = sns_backends[context.account_id][context.region]
            if (
                moto_sns_backend.get_topic(arn=topic_or_target_arn).content_based_deduplication
                == "false"
            ):
                if not message_deduplication_id:
                    raise InvalidParameterException(
                        "Invalid parameter: The topic should either have ContentBasedDeduplication enabled or MessageDeduplicationId provided explicitly",
                    )
        elif message_deduplication_id:
            
            raise InvalidParameterException(
                "Invalid parameter: MessageDeduplicationId Reason: The request includes MessageDeduplicationId parameter that is not valid for this topic type"
            )
        elif message_group_id:
            raise InvalidParameterException(
                "Invalid parameter: MessageGroupId Reason: The request includes MessageGroupId parameter that is not valid for this topic type"
            )