GitLab

* Contamination analysis for ARC_c, mmlu, and Hellaswag

* update `eval_contamination.py`

* update `contamination.py` summarizer

* fix `eval_contamination.py`

* add mmlu groups for contamination analysis

* add contamination analysis to ceval

* fix bugs

* add contamination docs

* to pass CI check

* update

---------
Co-authored-by: zhangyifan1 <zhangyifan1@pjlab.org.cn>
Co-authored-by: Leymore <zfz-960727@163.com>