TTS support with dataset bug fixes

[pcsid]

…mosv2 for mean opinion score estimation. Small dataset pathway bug adjustments.

📌 Description

This feature was to added to support text to speech evaluations for AU-Harness. Cartesia, Deepgram, and ElevenLabs clients are supported.

Also made some bug fixes to the dataset paths in the ASR task.

🛠️ Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality including new tasks)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactor / Code cleanup
• Maintenance / Chore / Task
• Other (please describe):

✅ How Has This Been Tested?

• Unit tests
• Integration tests
• Manual testing

Test Results / Screenshots (if applicable):

📸 Screenshots / Demos

📋 Checklist

• Code follows project style guidelines
• Tests have been added/updated (if applicable)
• Documentation has been updated (if applicable)
• Linked relevant issue(s)
• Self-reviewed my code

🙌 Additional Notes