Fix cache directory for partial datasets for `split-descriptive-statistics` runner
fixes https://github.com/huggingface/datasets-server/issues/1831

fix glob pattern: preserve 'partial' in a split dir name
Fix cache directory for partial datasets for `split-descriptive-statistics` runner: fixes https://github.com/huggingface/datasets-server/issues/1831

fix glob pattern: preserve 'partial' in a split dir name