### 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.response = response
        self.iterator = response.iter_encoded()
        self._buf = None
    def readable(self):
        return True
    def readinto(self, b):
        try:
            upto = len(b)  
            chunk = self._buf or next(self.iterator)
            output, self._buf = chunk[:upto], chunk[upto:]
            b[: len(output)] = output
            return len(output)
        except StopIteration:
            return 0  
    def __str__(self):
        length = self.response.content_length
        if length is None:
            length = "unknown"
        return f"StreamedBytes({length})"
    def __repr__(self):
        return self.__str__()
class _RawStream:
    """This is a compatibility adapter for the raw_stream attribute passed to botocore's EventStream."""
    def __init__(self, response: Response):
        self.response = response
        self.iterator = response.iter_encoded()
    def stream(self) -> Iterable[bytes]:
        return self.iterator
    def close(self):