Fix OpenVINO missing batch-size bug

[glenn-jocher]

May resolve #9248

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Improved OpenVINO backend initialization for better flexibility and performance.

📊 Key Changes

• Removed unnecessary batch size determination code in the OpenVINO initialization process.
• Streamlined the logging message to focus on the batch and inference mode, rather than batch size.
• Simplified the handling of layouts for OpenVINO models.

🎯 Purpose & Impact

• Enhanced Flexibility: 🔄 By focusing on inference mode based on batch input rather than a static batch size, this update adds flexibility to the backend initialization, accommodating a wider range of use cases.
• Improved Clarity: 💬 The logging now directly states the inference mode and batch, making it easier for users to understand how their model is being executed.
• Performance Optimization: ⏩ Simplifying model initialization can lead to slight performance improvements during the setup phase, especially for dynamic scenarios where batch size may vary.

This change enhances the user and developer experience by making the backend more adaptable and the logging more informative, potentially contributing to smoother and more efficient model deployments.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.11%. Comparing base (8d31c50) to head (241cea6).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9264      +/-   ##
==========================================
- Coverage   76.95%   76.11%   -0.85%     
==========================================
  Files         117      117              
  Lines       14865    14862       -3     
==========================================
- Hits        11440    11312     -128     
- Misses       3425     3550     +125     

Flag	Coverage Δ
Benchmarks	36.46% <100.00%> (-0.27%)	⬇️
GPU	38.83% <0.00%> (+<0.01%)	⬆️
Tests	71.37% <100.00%> (-0.72%)	⬇️

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