[Bugfix] Configuration for knowledge competency | Aggregation of multi-choice questions

[yongxb]

Description

Should include a concise description of the changes (bug or feature), it's impact, along with a summary of the solution
If it is a bug, please provide details on the environment the bug is found, and detailed steps to recreate the bug.

This PR addresses the following issues

1. Misconfiguration of the file pathing for some tasks in the knowledge competency
2. Loading of the Thai Exam IC dataset
3. Update the identification of multi-choice questions during the aggregation of metrics

PR Checklist

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General check-list

• I am merging to the dev branch
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• My code follows the code style of this project.
• I ran the lint checks which produced no new errors nor warnings for my changes.

If a new evaluation is added

• I have run the evaluation on a few models and the responses for a few models are expected.
• I have checked through the dataset and did not identify any issues with the data quality.
• I have checked the LLM judges and they are scoring the outputs correctly for a range of responses.
• I have tested that the metric works and the scores make sense.

Does This Introduce a Breaking Change?

If this introduces a breaking change, please describe the impact and migration path for existing applications below.

• Yes
• No

Testing

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• Which test sets were used.
• Description of test scenarios that you have tried.

The code has been tested and the inference results/metrics were obtained for Thai Exam and Global MMLU lite

Any Relevant Logs or Outputs

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Other Information or Known Dependencies

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• TODO that are to be done after this PR.