Fix o1-pro on OpenRouter

[cte]

Related GitHub Issue

Closes: #3725

Description

OpenRouter's supported_parameters indicates that temperature is allowed but it is not. We're manually stripping it for now, but longer term we should add this to ModelInfo.

I also switched some test from jest to vitest to see how smoothly that can go (it's not bad).

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Important

Fixes temperature parameter handling for specific models in OpenRouter and switches tests from Jest to Vitest.

• Behavior:
  • Strips temperature parameter for o1, o1-preview, o1-mini, o3-mini, and o1-pro models in getModelParams() in model-params.ts.
  • Adds tests in openai-native.spec.ts to verify temperature handling for these models.
• Testing:
  • Switches from Jest to Vitest in ollama.spec.ts, openai-native.spec.ts, openai-usage-tracking.spec.ts, and openai.spec.ts.
  • Updates mock implementations to use vitest.fn() and vitest.mock().
• Misc:
  • Updates vitest.config.ts to include global test settings.

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