ONNX debug improvements

[antimora]

Minor ONNX debug improvements.

Pull Request Template

Checklist

• Confirmed that run-checks all script has been executed.
• Made sure the book is up to date with changes in this PR.

Related Issues/PRs

#1560

Changes

1. Collect missing Op names and display at once.
2. Other minor improvements.

Testing

Tested on the user's onnx file.

[codecov]

Codecov Report

Attention: Patch coverage is 81.25000% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 86.41%. Comparing base (1cdceb5) to head (bb89dbd).
Report is 2 commits behind head on main.

Files	Patch %	Lines
crates/burn-import/src/onnx/to_burn.rs	66.66%	2 Missing ⚠️
crates/burn-import/src/onnx/op_configuration.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1712      +/-   ##
==========================================
- Coverage   86.51%   86.41%   -0.10%     
==========================================
  Files         696      698       +2     
  Lines       81498    81797     +299     
==========================================
+ Hits        70506    70683     +177     
- Misses      10992    11114     +122     

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[laggui]

LGTM, just had a question related to one of the comments.

[laggui]

Is this specific to an opset that's not supported yet, hence the "TODO"?

[antimora]

Yes, correct. I do not have a specific use case but since we handle similar one and I noticed from the spec, we are missing it. I just added TODO as a debt, which we do not need to make a payment on.