Add IS_JETSON constant

[glenn-jocher]

@lakshanthad per your earlier comment

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Enhanced device detection for Raspberry Pi and Jetson platforms in Ultralytics framework.

📊 Key Changes

• 📝 Added a new function read_device_model() to read device model information efficiently.
• 🔄 Modified is_raspberrypi() and is_jetson() functions to utilize cached device model information for faster and more reliable device checks.
• 🧰 Introduced PROC_DEVICE_MODEL constant for caching the device model information right at the start, reducing redundant file reads.
• ➕ Added IS_JETSON constant for quick Jetson platform detection across the library.

🎯 Purpose & Impact

• 🚀 Faster Device Checks: With the caching of device model info, device checks for Raspberry Pi and Jetson devices become quicker, enhancing the overall performance when these functions are called.
• 🤖 Better Support for Edge Devices: By improving the reliability and speed of device detection, developers working on or targeting Raspberry Pi and Jetson platforms will experience smoother integrations and potentially fewer compatibility issues.
• ⏱ Efficiency Boost: Reducing the need to repeatedly access system files for device model info minimizes I/O operations, leading to slightly better performance and efficiency, especially in environments where such checks are frequent.

[glenn-jocher]

We've now got two separate functions attempting to load and read "/proc/device-tree/model", we should optimize so it's only read once.

[codecov]

Codecov Report

Attention: Patch coverage is 90.00000% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 76.16%. Comparing base (01b34a4) to head (9971d1a).

❗ Current head 9971d1a differs from pull request most recent head 8e39ad2. Consider uploading reports for the commit 8e39ad2 to get more accurate results

Files	Patch %	Lines
ultralytics/utils/__init__.py	90.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9852   +/-   ##
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  Coverage   76.15%   76.16%           
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  Files         121      121           
  Lines       15288    15294    +6     
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+ Hits        11643    11648    +5     
- Misses       3645     3646    +1     

Flag	Coverage Δ
Benchmarks	36.13% <90.00%> (+0.02%)	⬆️
GPU	38.02% <90.00%> (+0.01%)	⬆️
Tests	71.45% <90.00%> (+<0.01%)	⬆️

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[glenn-jocher]

Fixed! Proc device model file only read once and now available in the workspace for further hardware discover.

[lakshanthad]

Thank you for the addition @glenn-jocher. However, there is a small issue here:
#9876