Add Global-MMLU

[shivalika-singh]

We just released Global-MMLU and would like to integrate it with eval-harness. I'd be happy to submit a PR to support this. What would be the best way to structure this ?

I was planning on setting it up similar to okapi-mmlu task. Let me know if that'd work ?

[baberabb]

Hi! That would be great! And congrats on the release - love the cultural bias analysis. okapi does sound like a good starting point!