Changes to get llm

added the non-success response with the status 503

removed the advanced_voice enum value from the llmFormat response property for the response status 200

added the optional property isDeprecated to the response with the 200 status

the response property reasoningEffort became nullable for the status 200

the response property reasoningFormat became nullable for the status 200

added the new undefined enum value to the reasoningFormat response property for the response status 200

added the non-success response with the status 403

removed the default enum value from the reasoningEffort response property for the response status 200

removed the high enum value from the reasoningEffort response property for the response status 200

removed the low enum value from the reasoningEffort response property for the response status 200

removed the medium enum value from the reasoningEffort response property for the response status 200

removed the raw enum value from the reasoningFormat response property for the response status 200