Delete legacy dataset_infos.json

Delete loading script

Convert dataset to Parquet

add dataset_info in dataset metadata

remove dummmy data

Add `language_bcp47` tag (#4753)

Align more metadata with other repo types (models,spaces) (#4607)

Remove config names as yaml keys (#4367)

Update datasets task tags to align tags with models (#4067)

Update files from the datasets library (from 1.13.0)