fix(drivers-prompt-openai): conditionally add modalities/reasoning_effort based on model

[vachillo]

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Describe your changes

Fix driver for reasoning models

openai.BadRequestError: Error code: 400 - {'error': {'message': "Unknown parameter: 'modalities'.", 'type': 'invalid_request_error', 'param':        
                             'modalities', 'code': 'unknown_parameter'}}     

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[codecov]

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