feat: implement loglikelihood and loglikelihood_rolling for LiteLLMClient (closes #1093)#1244

ALI-AL-MARJANI wants to merge 2 commits into

huggingface:mainhuggingface/lighteval:mainfrom

ALI-AL-MARJANI:feature/litellm-loglikelihood-supportALI-AL-MARJANI/lighteval-remote-eval-engine:feature/litellm-loglikelihood-supportCopy head branch name to clipboard