[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>
```

'MessageBody': 'msgBody{:02d}'.format(0),
            'MessageAttributes': {
                'CustomAttribute': {
                    'DataType': 'String',
                    'StringValue': 'CustomAttributeValue{:02d}'.format(0)
                }
            }
        }]
        result = client.send_message_batch(QueueUrl=queue_url, Entries=entries)
        self.assertEqual(result['ResponseMetadata']['HTTPStatusCode'], 200)
        
        client.delete_queue(QueueUrl=queue_url)
    def _run_test_lambda_invoked_by_sqs_message_with_delay_seconds_dotnet(self, zip_file, handler, runtime):
        if not use_docker():
            return
        func_name = 'dotnet-sqs-{}'.format(short_uid())
        queue_name = 'queue-%s' % short_uid()
        queue_url = self.client.create_queue(QueueName=queue_name)['QueueUrl']
        queue_arn = aws_stack.sqs_queue_arn(queue_name)
        delay_time = 1
        testutil.create_lambda_function(
            func_name=func_name,
            zip_file=zip_file,
            handler=handler,
            runtime=runtime)
        lambda_client = aws_stack.connect_to_service('lambda')
        lambda_client.create_event_source_mapping(
            EventSourceArn=queue_arn,
            FunctionName=func_name
        )