chore: update models for integration tests of cerebras and fireworks

[njbrake]

Description

PR Type

• 🆕 New Feature
• 🐛 Bug Fix
• 💅 Refactor
• 📚 Documentation
• 🚦 Infrastructure

Relevant issues

Checklist

• I understand the code I am submitting.
• I have added unit tests that prove my fix/feature works
• I have run this code locally and verified it fixes the issue.
• New and existing tests pass locally
• Documentation was updated where necessary
• I have read and followed the contribution guidelines
• AI Usage:
  • No AI was used.
  • AI was used for drafting/refactoring.
  • This is fully AI-generated.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
see 41 files with indirect coverage changes

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