Enhance slice operation to support more range variation

[antimora]

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

#1915, #1981, #1982, #1983

Changes

Primarily to support ONNX slice operation and closer PyTorch compatibility.

1. Enhance slice operation to support more range variations: None for a missing rage and negative ranks in ranges.
2. Clamp range start and end to dimension ranks.

Testing

More unit tests

[antimora]

@johnhuichen, please review this PR if you have a chance since you worked in this area previosly.

[laggui]

LGTM! Just gotta fix the CI errors on the doc tests.

[codecov]

Codecov Report

Attention: Patch coverage is 93.54839% with 10 lines in your changes missing coverage. Please review.

Project coverage is 85.36%. Comparing base (c9e9054) to head (690f3cc).
Report is 3 commits behind head on main.

Files	Patch %	Lines
crates/burn-import/src/onnx/op_configuration.rs	76.92%	9 Missing ⚠️
crates/burn-import/src/burn/node/slice.rs	91.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1989      +/-   ##
==========================================
- Coverage   85.50%   85.36%   -0.14%     
==========================================
  Files         811      820       +9     
  Lines      100449   101175     +726     
==========================================
+ Hits        85887    86372     +485     
- Misses      14562    14803     +241     

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