Handle OpenAI::Files request parameters

[okorepanov]

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Description

In my case, we use LiteLLM as main LLM provider.
I was aiming to use a Batches API via Azure provider, and to so, I have to manually pass additional parameters in LiteLLM API requests.

For example, in order to read file content via Files API, we use additional provider parameter.

def get_file_content(file_id:)
  client.files.content(id: file_id, parameters: { provider: 'azure' })
end

Currently we Monkey Patched OpenAI::Files module to handle parameters key, until appropriate changes will be merged or implemented.