### 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 = self.get_store()
        if topic_arn not in store.sns_subscriptions:
            raise NotFoundException(
                "Topic does not exist",
            )
        ids = [entry["Id"] for entry in publish_batch_request_entries]
        if len(set(ids)) != len(publish_batch_request_entries):
            raise BatchEntryIdsNotDistinctException(
                "Two or more batch entries in the request have the same Id."
            )
        if ".fifo" in topic_arn:
            if not all(["MessageGroupId" in entry for entry in publish_batch_request_entries]):
                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_arn).content_based_deduplication == "false":
                if not all(
                    ["MessageDeduplicationId" in entry for entry in publish_batch_request_entries]
                ):
                    raise InvalidParameterException(
                        "Invalid parameter: The topic should either have ContentBasedDeduplication enabled or MessageDeduplicationId provided explicitly",
                    )
        
        response = {"Successful": [], "Failed": []}
        for entry in publish_batch_request_entries:
            message_attributes = entry.get("MessageAttributes", {})
            if message_attributes: