Fix DDP destruction LOGGER.info()

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Improved logging for distributed training cleanup.

📊 Key Changes

• Split the logging and cleanup process into two separate lines in train.py.

🎯 Purpose & Impact

• 🎯 Purpose: Clarifies the logging output by ensuring the 'Destroying process group...' message is logged before the process group is destroyed.
• 🎯 Impact: This makes it easier for users to understand what is happening during the end of distributed training sessions, especially if an error occurs during the cleanup phase.