Update wandb_utils.py

[d57montes]

is_valset_wandb_artifact and is_trainset_wandb_artifact were referenced before assignment causing wandb to be unusable.

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhancement of Weights & Biases integration for dataset tracking.

📊 Key Changes

• Split a single flag is_wandb_artifact into two: is_trainset_wandb_artifact and is_valset_wandb_artifact.
• Improved clarity in distinguishing between training and validation dataset artifact status within Weights & Biases.

🎯 Purpose & Impact

• Provides better granularity by separately identifying the use of Weights & Biases artifacts for training and validation datasets.
• 🎉 Allows users to more accurately track and version their datasets, potentially improving experiment management and reproducibility.
• Minimal user impact in terms of usability, mostly affecting how data is logged and tracked in the backend.

[github-actions]

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[glenn-jocher]

@d57montes thanks for the PR!

@AyushExel can you review this?

[AyushExel]

@d57montes Thanks for flagging this. I think line is_wandb_artifact = False can be removed too. Please verify.
@glenn-jocher Yes, this looks good :)

[AyushExel]

@glenn-jocher approved the changes

[glenn-jocher]

@AyushExel thanks for the review! Yes is_wandb_artifact = False is removed in this PR as you suggested.

[glenn-jocher]

@d57montes @AyushExel PR is merged. Thank you for your contributions to YOLOv5 🚀 and Vision AI ⭐