Update datasets to 2.15.0 and huggingface-hub to 0.18.0
Update `datasets` to 2.15.0 and `huggingface-hub` to 0.18.0.

Close #2121 and close #1956
Update datasets to 2.15.0 and huggingface-hub to 0.18.0: Update `datasets` to 2.15.0 and `huggingface-hub` to 0.18.0.

Close #2121 and close #1956