### 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_
)
        snapshot.match("duplicate-key-error", exc.value.response)
        sns_client.tag_resource(
            ResourceArn=topic_arn,
            Tags=[
                {"Key": "k1", "Value": "v1"},
                {"Key": "k2", "Value": "v2"},
            ],
        )
        tags = sns_client.list_tags_for_resource(ResourceArn=topic_arn)
        # c
        tags["Tags"].sort(key=itemgetter("Key"))
        snapshot.match("list-created-tags", tags)
        sns_client.untag_resource(ResourceArn=topic_arn, TagKeys=["k1"])
        tags = sns_client.list_tags_for_resource(ResourceArn=topic_arn)
        snapshot.match("list-after-delete-tags", tags)
        # t
        sns_client.tag_resource(ResourceArn=topic_arn, Tags=[{"Key": "k2", "Value": "v2b"}])
        tags = sns_client.list_tags_for_resource(ResourceArn=topic_arn)
        snapshot.match("list-after-update-tags", tags)
    @pytest.mark.only_localstack
    def test_topic_subscription(self, sns_client, sns_create_topic, sns_subscription):
        topic_arn = sns_create_topic()["TopicArn"]
        subscription = sns_subscription(
            TopicArn=topic_arn,
            Protocol="email",
            Endpoint="localstack@yopmail.com",
        )
        sns_backend = SnsProvider.get_store()
        def check_subscription():