Do not save hyp.yaml and opt.yaml on evolve

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Improvements to configuration saving in training script and fix to generation indexing in hyperparameter evolution logging.

📊 Key Changes

• Conditional saving of hyp.yaml and opt.yaml files to exclude them during hyperparameter evolution (evolve).
• Correctly adjusted the index for displaying the last generation number in hyperparameter evolution results output.

🎯 Purpose & Impact

• The conditional saving prevents unnecessary overwriting of hyperparameter files when performing evolution, which can protect evolved configuration sets from being replaced. 🛡️
• The adjustment to the last generation index ensures the accurate representation of generations, enhancing user comprehension of the evolution process. 🧬

These changes aim to refine the training process and maintain clarity in the hyperparameter evolution procedure for users and developers alike.