Nerdai/truthfulqa mini dataset

[nerdai]

Description

• Adds MiniTruthfulQA dataset
• Updates field name containsExamplesByAi

Fixes # (issue)

Type of Change

Please delete options that are not relevant.

• [x] New Dataset

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [x] Tested e2e notebook (that tests end-to-end)