[jrmccluskey]

• Update ONNX extras

• Trigger postcommits

• Fix py311-ml onnx bounds

• add onnxscript to tox environment

• Add onnxscript to ml_base

[github-actions]

📋 Review Summary

This PR cleanly cherry-picks #40821 into release-2.78, modernizing the ONNX optional dependencies in setup.py and re-enabling the ONNX inference unit test suite across tox.ini and Gradle.

🔍 General Feedback

• The cherry-pick matches the original commit in #40821 with no merge discrepancies.
• Keras 3 compatibility adjustments, PyTorch opset updates, and tox dependency bounds are well-structured and properly aligned.

---

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.81%. Comparing base (3b59922) to head (cc9bbe2).
⚠️ Report is 1 commits behind head on release-2.78.

Additional details and impacted files

@@                Coverage Diff                @@
##           release-2.78   #40884       +/-   ##
=================================================
+ Coverage              0   79.81%   +79.81%     
=================================================
  Files                 0      494      +494     
  Lines                 0    83573    +83573     
=================================================
+ Hits                  0    66707    +66707     
- Misses                0    16866    +16866     

Flag	Coverage Δ
python	79.81% <ø> (?)

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[github-actions]

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R: @damccorm for label python.
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