Extending to Azure OpenAI implementation

[pkt1583]

This PR allows to use Azure OpenAI implementation. Since the API structure in openAI and Azure openAI is same the client can be initialised by looking at environment variable presence of AZURE_OPENAI_ENDPOINT. If we rely on CompletionFn endpoint then the code will still be more or less copy paste of existing OpenAI completionfn's

[SeryioGonzalez]

Azure OpenAI support would be an ideal add-on to this great tool.

[rogerpou]

I've tested it and the oaieval gpt-3.5-turbo born-first --max_samples 10 and it works.
Just note that following your code the API Keys should be in this format:

return AzureOpenAI(
            api_key=os.environ.get("OPENAI_API_KEY"),
            azure_endpoint=os.environ.get("OPENAI_AZURE_ENDPOINT"),
            api_version=os.environ.get("OPENAI_API_VERSION"),
            azure_deployment=os.environ.get("OPENAI_AZURE_DEPLOYMENT"),
        )

[pkt1583]

Can this be reviewed and merged? @andrew-openai @jwang47 @logankilpatrick @etr2460 @katyhshi

[pkt1583]

Anyone available to review this PR? It has been lying around for quite some time

[mogokhalifa]

Any updates on merging this PR?

[pkt1583]

running out of luck of getting attention of reviewers.