[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>
```

queue_name = 'queue-%s' % short_uid()
        queue_info = self.client.create_queue(QueueName=queue_name)
        queue_url = queue_info['QueueUrl']
        self.assertIn(queue_name, queue_url)
        
        self.client.send_message(QueueUrl=queue_url, MessageBody='msg123')
        for i in range(2):
            messages = self.client.receive_message(QueueUrl=queue_url, VisibilityTimeout=0)['Messages']
            self.assertEqual(len(messages), 1)
            self.assertEqual(messages[0]['Body'], 'msg123')
        
        self.client.delete_message(QueueUrl=queue_url, ReceiptHandle=messages[0]['ReceiptHandle'])
        response = self.client.receive_message(QueueUrl=queue_url)
        self.assertFalse(response.get('Messages'))
        
        self.client.send_message(QueueUrl=queue_url, MessageBody='msg234')
        messages = self.client.receive_message(QueueUrl=queue_url)['Messages']
        response = self.client.receive_message(QueueUrl=queue_url)
        self.assertFalse(response.get('Messages'))
        self.client.change_message_visibility(QueueUrl=queue_url,
                                              ReceiptHandle=messages[0]['ReceiptHandle'], VisibilityTimeout=0)
        for i in range(2):
            messages = self.client.receive_message(QueueUrl=queue_url, VisibilityTimeout=0)['Messages']
            self.assertEquals(len(messages), 1)
            self.assertEquals(messages[0]['Body'], 'msg234')
        
        self.client.delete_queue(QueueUrl=queue_url)
    def test_publish_get_delete_message_batch(self):