Re-lower row group
Re-add the changes from https://github.com/huggingface/datasets-server/pull/833 that were inadvertently removed by https://github.com/huggingface/datasets-server/pull/985

close https://github.com/huggingface/datasets-server/issues/1127
Re-lower row group: Re-add the changes from https://github.com/huggingface/datasets-server/pull/833 that were inadvertently removed by https://github.com/huggingface/datasets-server/pull/985

close https://github.com/huggingface/datasets-server/issues/1127