[Doc] Unify structured outputs examples

[aarnphm]

This PR unify the three files for structured_outputs examples onto one, openai_chat_completion_structured_outputs.py:

• Now we will run with all supported features (regex, choice, structural_tags, json, grammar)
• enable for reasoning trace with --reasoning
• enable streaming outputs with --stream

Signed-off-by: Aaron Pham [email protected]

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This pull request has merge conflicts that must be resolved before it can be merged. Please rebase the PR, @aarnphm.

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This pull request has merge conflicts that must be resolved before it can be merged. Please rebase the PR, @aarnphm.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

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This pull request has merge conflicts that must be resolved before it can be merged. Please rebase the PR, @aarnphm.

https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/syncing-a-fork

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