### 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.
service: str,
    action: str,
    response: dict,
    status_code=200,
    expected_response_content: dict = None,
) -> dict:
    """
    Performs an integration test for the serializer using botocore as parser.
    It executes the following steps:
    - Load the given service (f.e. "sqs")
    - Serialize the response with the appropriate serializer from the AWS Serivce Framework
    - Parse the serialized response using the botocore parser
    - Checks if the metadata is correct (status code, requestID,...)
    - Checks if the parsed response content is equal to the input to the serializer
    :param service: to load the correct service specification, serializer, and parser
    :param action: to load the correct service specification, serializer, and parser
    :param response: which should be serialized and tested against
    :param status_code: Optional - expected status code of the response - defaults to 200
    :param expected_response_content: Optional - if the input data ("response") differs from the actually expected data
                                      (because f.e. it contains None values)
    :return: boto-parsed serialized response
    """
    
    service = load_service(service)
    
    response_serializer = create_serializer(service)
    
    response_to_parse = copy.deepcopy(response)
    serialized_response = response_serializer.serialize_to_response(