[X] bug report
[ ] feature request

# Detailed description

The AWS API supports Authorization parameters as GET parameters, e.g. here's a GET request to SendMessage on SQS:

```
curl 'http://localhost:4566/000000000000/SomeQueue.fifo?Action=SendMessage&MessageGroupId=Default&MessageDeduplicationId=1615597859837&MessageBody=%7B%22gateway_id%22%3A%20%2204e73c80-3539-499c-92a4-a0b106c2f6ab%22%7D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=test%2F20210313%2Fus-east-1%2Fsqs%2Faws4_request&X-Amz-Date=20210313T011059Z&X-Amz-Expires=86400000&X-Amz-SignedHeaders=host&X-Amz-Signature=2c652c7bc9a3b75579db3d987d1e6dd056f0ac776c1e1d4ec91e2ce84e5ad3ae'
```

## Expected behavior

Should send the message and return receipt information.

## Actual behavior

Returns...

```
<?xml version="1.0" encoding="UTF-8"?>
<Error>
    <Code>NoSuchBucket</Code>
    <Message>The specified bucket does not exist</Message>
    <BucketName>000000000000</BucketName>
    <RequestID>7a62c49f-347e-4fc4-9331-6e8eEXAMPLE</RequestID>
</Error>
```

return self._stream_value(self._stdout)
    def stderr(self):
        return self._stream_value(self._stderr)
    def _stream_value(self, stream):
        return stream.getvalue() if hasattr(stream, 'getvalue') else stream
def start_thread(method, *args, **kwargs):
    _shutdown_hook = kwargs.pop('_shutdown_hook', True)
    thread = FuncThread(method, *args, **kwargs)
    thread.start()
    if _shutdown_hook:
        TMP_THREADS.append(thread)
    return thread
def start_worker_thread(method, *args, **kwargs):
    return start_thread(method, *args, _shutdown_hook=False, **kwargs)
def empty_context_manager():
    import contextlib
    return contextlib.nullcontext()
def synchronized(lock=None):
    """
    Synchronization decorator as described in
    http://blog.dscpl.com.au/2014/01/the-missing-synchronized-decorator.html.
    """
    def _decorator(wrapped):
        @functools.wraps(wrapped)
        def _wrapper(*args, **kwargs):
            with lock:
                return wrapped(*args, **kwargs)
        return _wrapper
    return _decorator
def prevent_stack_overflow(match_parameters=False):