fix(v4): toJSONSchema - wrong record tuple output when targeting openapi-3.0

[marcalexiei]

• closes [v4] toJSONSchema - openapi-3.0 - wrong tuple output #5143

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I refactored the logic for converting tuples in a JSON schema:

1. Retrieve the static elements
2. Retrieve any additional elements (if available)
3. Assemble the properties into the json variable based on the target

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I also added a separate commit to remove the unused variable data in get-llm-text.ts,
which eliminates warnings when running biome checks.