Fix estimate info for zip datasets (#2932)
* fix estimate info for zip
* fix fs
* unused line
* fix test (doesn't take duplicate fiels into account)
* Update services/worker/tests/job_runners/config/test_parquet_and_info.py
Co-authored-by: Sylvain Lesage <sylvain.lesage@huggingface.co>
* add comments
* add test
---------
Co-authored-by: Sylvain Lesage <sylvain.lesage@huggingface.co>
