### 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_
topic_name = "test-duplicated-topic-more-tags"
        sns_create_topic(Name=topic_name)
        with pytest.raises(ClientError) as e:
            sns_client.create_topic(Name=topic_name, Tags=[{"Key": "key1", "Value": "value1"}])
        snapshot.match("exception-duplicate", e.value.response)
    @pytest.mark.aws_validated
    def test_create_duplicate_topic_check_idempotency(self, sns_create_topic, snapshot):
        topic_name = f"test-{short_uid()}"
        tags = [{"Key": "a", "Value": "1"}, {"Key": "b", "Value": "2"}]
        kwargs = [
            {"Tags": tags},  # t
            {"Tags": [tags[0]]},  # t
            {"Tags": []},  # t
        ]
        # c
        response = sns_create_topic(Name=topic_name, Tags=tags)
        snapshot.match("response-created", response)
        for index, arg in enumerate(kwargs):
            response = sns_create_topic(Name=topic_name, **arg)
            # w
            snapshot.match(f"response-same-arn-{index}", response)
    @pytest.mark.only_localstack
    @pytest.mark.skip(
        reason="Idempotency not supported in Moto backend. See bug https://github.com/spulec/moto/issues/2333"
    )
    def test_create_platform_endpoint_check_idempotency(