Infer convolution kernel shape from weight

[laggui]

Checklist

• Confirmed that run-checks all script has been executed.

Related Issues/PRs

Fixes #2430

Changes

Infer convolution kernel shape from weights (in line with ONNX spec)

[codecov]

Codecov Report

Attention: Patch coverage is 75.75758% with 8 lines in your changes missing coverage. Please review.

Project coverage is 82.50%. Comparing base (1e511b5) to head (15955ca).
Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/onnx-ir/src/node_remap.rs	50.00%	4 Missing ⚠️
crates/burn-import/src/onnx/op_configuration.rs	66.66%	3 Missing ⚠️
crates/onnx-ir/src/util.rs	93.75%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2544      +/-   ##
==========================================
- Coverage   82.50%   82.50%   -0.01%     
==========================================
  Files         828      828              
  Lines      107040   107073      +33     
==========================================
+ Hits        88314    88336      +22     
- Misses      18726    18737      +11     

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[nathanielsimard]

LGTM