[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>
```

handler_file=TEST_LAMBDA_ECHO_FILE,
            func_name=function_name,
            runtime=LAMBDA_RUNTIME_PYTHON36
        )
        lambda_client = aws_stack.connect_to_service('lambda')
        lambda_client.create_event_source_mapping(
            EventSourceArn=queue_arn,
            FunctionName=function_name
        )
        rs = self.client.send_message(
            QueueUrl=queue_url,
            MessageBody='hello world.',
            DelaySeconds=delay_time
        )
        message_id = rs['MessageId']
        time.sleep(delay_time / 2)
        
        log_events = get_lambda_log_events(function_name)
        self.assertEqual(len(log_events), 0)
        
        events = get_lambda_log_events(function_name, delay_time * 1.5)
        
        self.assertEqual(len(events), 1)
        message = events[0]['Records'][0]
        self.assertEqual(message['eventSourceARN'], queue_arn)
        self.assertEqual(message['messageId'], message_id)
        
        self.client.delete_queue(QueueUrl=queue_url)
        lambda_client.delete_function(FunctionName=function_name)
    def test_get_queue_attributes(self):