### 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_
self, context: RequestContext, resource_arn: AmazonResourceName, tag_keys: TagKeyList
    ) -> UntagResourceResponse:
        call_moto(context)
        store = self.get_store()
        store.sns_tags[resource_arn] = [
            t for t in _get_tags(resource_arn) if t["Key"] not in tag_keys
        ]
        return UntagResourceResponse()
    def list_tags_for_resource(
        self, context: RequestContext, resource_arn: AmazonResourceName
    ) -> ListTagsForResourceResponse:
        return ListTagsForResourceResponse(Tags=_get_tags(resource_arn))
    def delete_platform_application(
        self, context: RequestContext, platform_application_arn: String
    ) -> None:
        call_moto(context)
    def delete_endpoint(self, context: RequestContext, endpoint_arn: String) -> None:
        call_moto(context)
    def create_platform_application(
        self, context: RequestContext, name: String, platform: String, attributes: MapStringToString
    ) -> CreatePlatformApplicationResponse:
        
        
        
        
        
        moto_response = call_moto(context)
        return CreatePlatformApplicationResponse(**moto_response)
    def create_platform_endpoint(