Handled stream response from upload endpoints

[hassaanfarooq01]

Issue: Ultralytics upload model progress bar turns from 0 to 100 directly.
Fix: Handled stream response from upload endpoints

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhanced HTTP POST functionality with stream support in Ultralytics hub-sdk.

📊 Key Changes

• Added stream parameter to the post method in api_client.py.
• Enabled streaming uploads in upload_model and upload_dataset within server_clients.py.

🎯 Purpose & Impact

• Purpose: Incorporating streaming support allows large files to be uploaded more efficiently by sending the request as a continuous stream.
• Impact: Users uploading large models or datasets to Ultralytics services will experience more stable and possibly faster uploads, reducing the chance of timeout errors. This improvement can significantly enhance user experience when dealing with heavy data operations. 🚀📈