Refactor test.py arguments

[glenn-jocher]

@kalenmike @SkalskiP alright guys, I did some prep work in a few PRs earlier today, this is my first effort in refactoring one of our main file's arguments. This PR passes only arguments (no argparser class) to the test() function within test.py.

This means that test() should be callable from python similarly to how it's called currently in a bash command.

🛠️ PR Summary

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🌟 Summary

Improved clarity and usage flexibility in object detection and testing scripts.

📊 Key Changes

• 💬 Updated some comments for better clarity (e.g., check img_size is now check image size).
• 🏷️ Added more descriptive argument names and comments in test.py (e.g., imgsz=640, # image size).
• 🚀 Included new arguments for specifying project details in test.py (project, name, exist_ok, task, device).
• ✨ Streamlined argument parsing to enable cleaner function calls (test(**vars(opt))).
• 🧹 Cleaned up redundancy by directly calling test() with opt parameters unpacked.

🎯 Purpose & Impact

• 🧑‍💻 Helps developers and users understand script functionality and parameters more easily.
• 🛠️ Enables more configurable test runs without changing the codebase, simplifying automation and custom evaluations.
• 🌈 Promotes code cleanliness and reduces potential for errors, making maintenance easier for developers.
• 📈 The adjustments could lead to broader usage and easier integration into different workflows for end users.