### 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.
headers={
            entry_tuple[0].lower(): entry_tuple[1] for entry_tuple in serialized_response.headers
        },
        status=serialized_response.status_code,
        decode_content=False,
        preload_content=False,
    )
    requests_response = RequestsResponse()
    requests_response.headers = urllib_response.headers
    requests_response.status_code = urllib_response.status
    requests_response.raw = urllib_response
    botocore_response = convert_to_response_dict(requests_response, operation_model)
    
    response_parser: ResponseParser = create_parser(service.protocol)
    parsed_response = response_parser.parse(
        botocore_response,
        operation_model.output_shape,
    )
    
    assert "EventStream" in parsed_response
    
    events = list(parsed_response["EventStream"])
    assert len(events) == 2
    assert events[0] == {
        "SubscribeToShardEvent": {
            "ContinuationSequenceNumber": "1",
            "MillisBehindLatest": 1337,
            "Records": [
                {
                    "Data": b"event_data_1_record_1",