[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>
```

sqs = self.client
        queue_name1 = 'test-%s' % short_uid()
        queue_name2 = 'test-%s' % short_uid()
        sqs.create_queue(QueueName=queue_name1)
        queue_arn1 = aws_stack.sqs_queue_arn(queue_name1)
        policy = {'deadLetterTargetArn': queue_arn1, 'maxReceiveCount': 1}
        queue_url2 = self.client.create_queue(QueueName=queue_name2,
                                              Attributes={'RedrivePolicy': json.dumps(policy)})['QueueUrl']
        response = sqs.get_queue_attributes(QueueUrl=queue_url2)
        redrive_policy = json.loads(response['Attributes']['RedrivePolicy'])
        self.assertEqual(redrive_policy['maxReceiveCount'], 1)
        self.assertIn(redrive_policy['deadLetterTargetArn'], queue_arn1)
    def test_send_message_batch_with_empty_list(self):
        client = self.client
        response = client.create_queue(QueueName='test-queue')
        queue_url = response['QueueUrl']
        try:
            client.send_message_batch(QueueUrl=queue_url, Entries=[])
        except ClientError as e:
            self.assertEqual(e.response['Error']['Code'], 'EmptyBatchRequest')
            self.assertIn(e.response['ResponseMetadata']['HTTPStatusCode'], [400, 404])
        entries = [{
            'Id': 'message{:02d}'.format(0),