Use OpenAI REST API

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

This PR updates the ultralytics/actions to simplify the use of OpenAI and Azure OpenAI services in GitHub Actions.

📊 Key Changes

• Removed the REPO_NAME environment setting.
• Updated to install requests instead of both openai and requests via pip.
• Refined the function handling OpenAI and Azure OpenAI client initialization.
• Enhanced the API request method for obtaining completion results using either the OpenAI Python client or REST API.
• Updated environmental variable settings to streamline the differentiation between OpenAI and Azure OpenAI usage.

🎯 Purpose & Impact

• Simplicity: Reduces code complexity by removing unnecessary dependencies and environment variables.
• Consistency: Ensures uniform implementation when switching between OpenAI and Azure OpenAI services.
• Efficiency: Streamlined requests to the OpenAI API potentially improves performance and maintainability.
• Flexibility: Allows dynamic handling of both OpenAI and Azure OpenAI services without complex configurations.

Overall, these changes aim to make the GitHub Actions for generating PR summaries and auto-labeling issues more efficient and easier to maintain.