### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

In AWS, DescribeSubnet Response returns:
```
<?xml version="1.0" encoding="UTF-8"?>\n
    <Response>
        <Errors>
            <Error>
                <Code>InvalidSubnetID.NotFound</Code>
                <Message>The subnet ID \'test\' does not exist</Message>
            </Error>
        </Errors>
    <RequestID>f6d041c1-1c96-4720-af30-77745504e2ba</RequestID>
</Response>
```

whereas localstack returns:
```
<?xml version=\'1.0\' encoding=\'utf-8\'?>\n<Errors xmlns="http://ec2.amazonaws.com/doc/2016-11-15">
    <Error>
        <Code>InvalidSubnetID.NotFound</Code>
        <Message>aaThe subnet ID \'vpc-test\' does not exist</Message>
    </Error>
    <RequestID>EADJHWMM796CI5FT10XGFMGOXIPCBAHBWINMV0HR6SKBRODGCU5J</RequestID>
</Errors>

```

### Expected Behavior

It should return correct response structure. It causes terraform to complain.

### How are you starting LocalStack?

Custom (please describe below)

### Steps To Reproduce

#### How are you starting localstack (e.g., `bin/localstack` command, arguments, or `docker-compose.yml`)

    make start

#### Client commands (e.g., AWS SDK code snippet, or sequence of "awslocal" commands)

     awslocal ec2 describe-subnets --subnet-ids vpc-test --debug


### Environment

```markdown
- OS: M1 MacOS
- LocalStack: 1.0.2.dev
```


### Anything else?

Probably `call_moto` function in `localstack/services/moto.py` is changing the error code structure.
self, error: ServiceException, operation_model: OperationModel
    ) -> HttpResponse:
        """
        Takes an error instance and serializes it to an actual HttpResponse.
        Therefore this method is used for errors which should be serialized and transmitted to the calling client.
        :param error: to serialize
        :param operation_model: specification of the service & operation containing information about the shape of the
                                service's output / response
        :return: HttpResponse which can be sent to the calling client
        :raises: ResponseSerializerError (either a ProtocolSerializerError or an UnknownSerializerError)
        """
        # TODO implement streaming error serialization
        semodel)
        if not error or not isinstance(error, ServiceException):
            raise ProtocolSerializerError(
                f"Error to serialize ({error.__class__.__name__ if error else None}) is not a ServiceException."
            )
        shape = operation_model.service_model.shape_for_error_code(error.code)
        serialized_response.status_code = error.status_code
        self._serialize_error(error, serialized_response, shape, operation_model)
        serialized_response = self._prepare_additiin_response(
            serialized_response, operation_model
        )
        return serialized_response
    def _serialize_response(