Sweep: Add new LLMs Azure OpenAI model beside OpenAI

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• Config model Azure OpenAI on UI
• Customize url model, api_key, api_version, engine

Here is sample Python to call Azure OpenAI model:

#Note: The openai-python library support for Azure OpenAI is in preview.
import os
import openai
openai.api_type = "azure"
openai.api_base = "https://connect-llms.openai.azure.com/"
openai.api_version = "2023-07-01-preview"
openai.api_key = os.getenv("OPENAI_API_KEY")

response = openai.ChatCompletion.create(
  engine="connect-llms-gpt-4-32k",
  messages = [],
  temperature=0.7,
  max_tokens=800,
  top_p=0.95,
  frequency_penalty=0,
  presence_penalty=0,
  stop=None)