create datasetBlockages collection + block datasets
We apply rate limiting on the jobs, based on the total duration in a window (see https://github.com/huggingface/dataset-viewer/issues/2279#issuecomment-2178655627).

Follows #2931
create datasetBlockages collection + block datasets: We apply rate limiting on the jobs, based on the total duration in a window (see https://github.com/huggingface/dataset-viewer/issues/2279#issuecomment-2178655627).

Follows #2931