[Streaming] Only load requested splits without resolving files for the other splits
This should help fixing this issue: https://github.com/huggingface/datasets/pull/6832 I'm having a similar issue when using splices:
<img width="947" alt="image" src="https://github.com/huggingface/datasets/assets/28941213/2153faac-e1fe-4b6d-a79b-30b2699407e8">
<img width="823" alt="image" src="https://github.com/huggingface/datasets/assets/28941213/80919eca-eb6c-407d-8070-52642fdcee54">
<img width="914" alt="image" src="https://github.com/huggingface/datasets/assets/28941213/5219c201-e22e-4536-acc3-a922677785ff">


It seems to be downloading, loading, and generating splits using the entire dataset.
e.g. [thangvip](https://huggingface.co/thangvip)/[cosmopedia_vi_math](https://huggingface.co/datasets/thangvip/cosmopedia_vi_math) has 300 splits and it takes a very long time to load only one split.

This is due to `load_dataset()` resolving the files of all the splits even if only one is needed.

In `dataset-viewer` the splits are loaded in different jobs so it results in 300 jobs that resolve 300 splits -> 90k calls to `/paths-info`