Add gpt4o and gpt-4o-mini support

[Isydmr]

This PR adds support for the GPT-4o and GPT-4o-mini models, updates configurations, and upgrades the langfun and pyglove dependencies.

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[Isydmr]

@JerryWeiAI Could you please take a moment to review this PR when you get a chance?

[JerryWeiAI]

Thanks for adding GPT-4o support! These changes look good to me.

[JerryWeiAI]

@chengrunyang PTAL and merge if it looks good to you?