feat(openai): update model YAMLs [bot]

[models-bot]

Auto-generated by poc-agent for provider openai.

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Note

Low Risk
Single model YAML metadata change with no runtime code; may affect how callers route to this model if they relied on chat/responses.

Overview
Updates gpt-3.5-turbo-instruct.yaml so routing metadata matches OpenAI’s completions/instruct API instead of chat/responses.

mode changes from responses to completion, and supportedModes drops chat and responses in favor of completion only. The removeParams entry for max_tokens is removed.

^{Reviewed by Cursor Bugbot for commit 2621342. Bugbot is set up for automated code reviews on this repo. Configure here.}

[github-actions]

/test-models

[harshiv-26]

Gateway test results

• Total: 2
• Passed: 1
• Failed: 0
• Validation failed: 0
• Errored: 1
• Skipped: 0
• Success rate: 50.0%

Provider	Model	Scenarios
openai	gpt-3.5-turbo-instruct	success: params error: params:stream

Failures (1)

openai/gpt-3.5-turbo-instruct — params:stream (error)

Error

Endpoint returned empty snippet

Successes (1)

openai/gpt-3.5-turbo-instruct — params (success)

Output

The capital of France is Paris.