Added TurkishMMLU to LM Evaluation Harness

[ArdaYueksel]

In this pull request, I would like to add our work TurkishMMLU: Measuring Massive Multitask Language Understanding in Turkish to LM Evaluation Harness. You can find the details of our work in our repository: https://github.com/ArdaYueksel/TurkishMMLU Also, our dataset is made available in HuggingFace: https://huggingface.co/datasets/AYueksel/TurkishMMLU

Key Features:

• MMLU variant in Turkish Language
• Has a separate Development Set.
• Chain-of-Thought Configuration is available.

[CLAassistant]

All committers have signed the CLA.

[haileyschoelkopf]

Test failures unrelated.