In config-parquet-metadata, delete the old files before uploading new ones
I'm currently moving the parquet-metadata files to a new storage, and I see strange numbering for shards. See for example, in the same directory (35456 parquet files for this one):

```
root@prod-datasets-server-storage-admin-786cfbf44-4ncpv:/storage# ls parquet-metadata-new/Antreas/TALI-large-2/--/Antreas--TALI-large-2/ | tail
parquet-train-00059-of-00085.parquet
parquet-train-00059-of-00086.parquet
parquet-train-00059-of-00087.parquet
parquet-train-00059-of-00088.parquet
parquet-train-00059-of-00089.parquet
parquet-train-00059-of-00090.parquet
parquet-train-00059-of-00092.parquet
parquet-train-00059-of-00093.parquet
parquet-train-00059-of-00094.parquet
parquet-train-00059-of-00095.parquet
root@prod-datasets-server-storage-admin-786cfbf44-4ncpv:/storage# ls parquet-metadata-new/Antreas/TALI-large-2/--/Antreas--TALI-large-2/ | tail
parquet-train-00072-of-00257.parquet
parquet-train-00072-of-00258.parquet
parquet-train-00072-of-00259.parquet
parquet-train-00072-of-00260.parquet
parquet-train-00072-of-00261.parquet
parquet-train-00072-of-00262.parquet
parquet-train-00072-of-00264.parquet
parquet-train-00072-of-00265.parquet
parquet-train-00072-of-00266.parquet
parquet-train-00072-of-00267.parquet
```

Is it normal @lhoestq? I think the second number should never change for a given split, right?
In config-parquet-metadata, delete the old files before uploading new ones: I'm currently moving the parquet-metadata files to a new storage, and I see strange numbering for shards. See for example, in the same directory (35456 parquet files for this one):

```
root@prod-datasets-server-storage-admin-786cfbf44-4ncpv:/storage# ls parquet-metadata-new/Antreas/TALI-large-2/--/Antreas--TALI-large-2/ | tail
parquet-train-00059-of-00085.parquet
parquet-train-00059-of-00086.parquet
parquet-train-00059-of-00087.parquet
parquet-train-00059-of-00088.parquet
parquet-train-00059-of-00089.parquet
parquet-train-00059-of-00090.parquet
parquet-train-00059-of-00092.parquet
parquet-train-00059-of-00093.parquet
parquet-train-00059-of-00094.parquet
parquet-train-00059-of-00095.parquet
root@prod-datasets-server-storage-admin-786cfbf44-4ncpv:/storage# ls parquet-metadata-new/Antreas/TALI-large-2/--/Antreas--TALI-large-2/ | tail
parquet-train-00072-of-00257.parquet
parquet-train-00072-of-00258.parquet
parquet-train-00072-of-00259.parquet
parquet-train-00072-of-00260.parquet
parquet-train-00072-of-00261.parquet
parquet-train-00072-of-00262.parquet
parquet-train-00072-of-00264.parquet
parquet-train-00072-of-00265.parquet
parquet-train-00072-of-00266.parquet
parquet-train-00072-of-00267.parquet
```

Is it normal @lhoestq? I think the second number should never change for a given split, right?