Create dataset loader for Okapi m-TruthfulQA

[SamuelCahyawijaya]

Dataloader name: okapi_m_truthfulqa/okapi_m_truthfulqa.py
DataCatalogue: http://seacrowd.github.io/seacrowd-catalogue/card.html?okapi_m_truthfulqa

Dataset	okapi_m_truthfulqa
Description	m-TruthfulQA is a multi-lingual version of TruthfulQA, a benchmark to measure whether a language model is truthful in generating answers to questions. The benchmark comprises 817 questions that span 38 categories, including health, law, finance and politics.
Subsets	-
Languages	ind, vie
Tasks	Question Answering
License	Creative Commons Attribution Non Commercial 4.0 (cc-by-nc-4.0)
Homepage	http://nlp.uoregon.edu/download/okapi-eval/datasets/
HF URL	https://huggingface.co/datasets/jon-tow/okapi_truthfulqa
Paper URL	https://arxiv.org/abs/2307.16039

[tellarin]

#self-assign

[tellarin]

Back working on this. Sorry for the delay.