feat(py): Add Evaluator Metrics (ANSWER_RELEVANCY, FAITHFULNESS, MALICIOUSNESS)

[hendrixmar]

Description here... Help the reviewer by:

• linking to an issue that includes more details
• if it's a new feature include samples of how to use the new feature
• (optional if issue link is provided) if you fixed a bug include basic bug details

Checklist (if applicable):

• PR title is following https://www.conventionalcommits.org/en/v1.0.0/
• Tested (manually, unit tested, etc.)
• Docs updated (updated docs or a docs bug required)

[MengqinShen]

@hendrixmar you might need to run './py/bin/generate_schema_typing' locally and then commit the changes to push the changes. Do you use pre-commit? It can prevent this failing by running checks locally first.