Point .pq files to datasets bucket

[josvandervelde]

Goal

See Roadmap (high level) for the goal & reasoning.

In this PR

The .pq url is changed from
https://openml1.win.tue.nl/dataset45714/dataset_45714.pq to
https://openml1.win.tue.nl/datasets/0004/45714/dataset_45714.pq

How to test

I haven't tested this thoroughly. I just ran

$MINIO_URL = 'http://openml1.win.tue.nl/';
$data_id = 45714;
$bracket = sprintf('%04d', floor($data_id / 10000));
$padded_id = sprintf('%04d', $data_id);
$url = $MINIO_URL . 'datasets/' . $bracket . '/' . $padded_id . '/dataset_' . $data_id . '.pq';
echo($url);

In a php-sandbox and checked the resulting url.

[josvandervelde]

Hi @joaquinvanschoren could you review this PR, and if it's OK, could you deploy it / tell me how to deploy it?

[joaquinvanschoren]

Done, also deployed.