### 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.
parsed_response = response_parser.parse(
        response_dict,
        service.operation_model(action).output_shape,
    )
    
    error_shape = service.shape_for_error_code(exception.code)
    modeled_parse = response_parser.parse(response_dict, error_shape)
    parsed_response.update(modeled_parse)
    
    assert "Error" in parsed_response
    assert "Code" in parsed_response["Error"]
    assert "Message" in parsed_response["Error"]
    assert parsed_response["Error"]["Code"] == code
    assert parsed_response["Error"]["Message"] == message
    assert "ResponseMetadata" in parsed_response
    assert "RequestId" in parsed_response["ResponseMetadata"]
    assert len(parsed_response["ResponseMetadata"]["RequestId"]) == 52
    assert "HTTPStatusCode" in parsed_response["ResponseMetadata"]
    assert parsed_response["ResponseMetadata"]["HTTPStatusCode"] == status_code
    type = parsed_response["Error"].get("Type")
    if is_sender_fault:
        assert type == "Sender"
    else:
        assert type is None
    if additional_error_fields:
        for key, value in additional_error_fields.items():
            assert key in parsed_response
            assert parsed_response[key] == value
    return parsed_response
def test_rest_xml_serializer_cloudfront_with_botocore():