[Feature]: Support more configs for openAI models

Is your feature request related to a problem? Please describe.

Due to the document of openAI, we missed some major parameters of openAI document, see:

https://platform.openai.com/docs/api-reference/completions/create

1. max_tokens? just bypass to GPT for now
2. temperature: there are couple things we can do,
   1. randomly pick answer from returned result if they are all very similar.
   2. edit the answer with another small model：For instance image -> https://huggingface.co/lambdalabs/sd-image-variations-diffusers
3. n -> if there no enough cached result, we will need to generate from OpenAI anyway.
4. bestof -> control the topk numbers we want to retrieved from cache

Describe the solution you'd like.

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Describe an alternate solution.

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Anything else? (Additional Context)

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