### 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_
try:
                # A
                sns_client.set_subscription_attributes(
                    SubscriptionArn=subscription_arn,
                    AttributeName="RawMessageDelivery",
                    AttributeValue="true",
                )
                raise Exception("Subscription is not deleted")
            except ClientError as e:
                assert e.response["Error"]["Code"] == "NotFound"
                assert e.response["ResponseMetadata"]["HTTPStatusCode"] == 404
                snapshot.match("sub-not-found", e.response)
        retry(check_subscription_deleted, retries=10, sleep_before=0.2, sleep=3)
        subscriptions_by_topic = sns_client.list_subscriptions_by_topic(TopicArn=topic_arn)
        snapshot.match("subscriptions-for-topic-after-unsub", subscriptions_by_topic)
        assert len(subscriptions_by_topic["Subscriptions"]) == 0
    @pytest.mark.aws_validated
    @pytest.mark.skip_snapshot_verify(
        paths=[
            "$..Messages..Body.SignatureVersion",  # T
            "$..Messages..Body.Signature",
            "$..Messages..Body.SigningCertURL",
            "$..Messages..Body.SequenceNumber",
            "$..Messages..Attributes.SequenceNumber",
        ]
    )
    @pytest.mark.parametrize("content_based_deduplication", [True, False])
    def test_message_to_fifo_sqs(