Bump onnx from 1.14.1 to 1.21.0 in /src/model_converters/onnx2mxnet

Created by: dependabot[bot]

Bumps onnx from 1.14.1 to 1.21.0.

Release notes

Sourced from onnx's releases.

v1.21.0

ONNX v1.21.0 is now available with exciting new features! We would like to thank everyone who contributed to this release! Please visit onnx.ai to learn more about ONNX and associated projects.

What's Changed

Breaking Changes and Deprecations

• Remove defunct model hub integration by @​andife in onnx/onnx#7678

Spec and Operator

• Revert opset 25 version bump by @​titaiwangms in onnx/onnx#7441
• Add 2 bit support to onnx by @​vraspar in onnx/onnx#7446
• Bump opset version to 26 by @​titaiwangms in onnx/onnx#7469
• Remove enforcement to node determinism attribute by @​titaiwangms in onnx/onnx#7473
• Export functions by @​cyyever in onnx/onnx#7505
• [Reland] Cumulative Product Operator by @​titaiwangms in onnx/onnx#7400
• Fix Div integer semantics to use trunc division by @​MagellaX in onnx/onnx#7585
• Clarify DFT behavior when inverse=True and onesided=True (irfft) by @​simonbyrne in onnx/onnx#7574
• Specify 0/0 case in LpNormalization by @​titaiwangms in onnx/onnx#7618
• Clarify NonMaxSuppression IoU threshold uses strict comparison by @​Copilot in onnx/onnx#7619
• Relax model domain requirement from MUST to SHOULD by @​Copilot in onnx/onnx#7668
• Add BitCast operator for bitwise type reinterpretation by @​Copilot in onnx/onnx#7527

Reference Implementation

• Fix CenterCropPad: compare target shape with dimension, not axis index by @​Copilot in onnx/onnx#7522
• Vectorize sigmoid op implementation by @​justinchuby in onnx/onnx#7556
• Fixing verbose logging error at verbose=3 for reference_evaluator by @​rothej in onnx/onnx#7597
• Clean up reference evaluator tests by @​VedantMadane in onnx/onnx#7684

Utilities and Tools

• Add version check for test_executable_permission_check by @​andife in onnx/onnx#7511
• Fix index out of bounds in version converter adapters by @​rothej in onnx/onnx#7493
• Fix default attribute values in shape inference by @​matteosal in onnx/onnx#7602
• Fix Softmax-family shape inference for scalar inputs by @​MagellaX in onnx/onnx#7625
• Fix/merge models value info by @​MagellaX in onnx/onnx#7608
• Add version converter adapters for opset 15, 16, 17, 18 by @​alexkvitkevich in onnx/onnx#7677
• shape_inference: Validate expected size of scalar tensor in ParseData by @​skottmckay in onnx/onnx#7675

Build, CI and Tests

• Force labels in PRs by @​titaiwangms in onnx/onnx#7442
• Fix reuse by @​andife in onnx/onnx#7463
• Change precedence from 'aggregate' to 'override' for generating scripts by @​andife in onnx/onnx#7458
• a) 3.14-dev -> 3.14, b) reduce template injection thread by @​andife in onnx/onnx#7461
• Export register functions by @​cyyever in onnx/onnx#7496
• Fix Python executable detection in virtual environments by @​aoguntayo in onnx/onnx#7485
• Merged Release Workflows for Windows by @​Raghul-M in onnx/onnx#7509
• Bump nanobind to 2.10.2 by @​cyyever in onnx/onnx#7479
• Fix freebsd build by @​cyyever in onnx/onnx#7518
• Revert ONNX CMake changes by @​cyyever in onnx/onnx#7515
• Export functions used in PyTorch by @​cyyever in onnx/onnx#7524
• Export protobuf symbols by @​cyyever in onnx/onnx#7525
• Fix CMAKE_ARGS parsing for windows compatibility by @​hmaarrfk in onnx/onnx#7532
• Replace deprecated github action "test-results-action" by @​andife in onnx/onnx#7552
• Wheels for python 3.14t by @​andife in onnx/onnx#7558
• Clarify permissions comment and update dependencies install by @​andife in onnx/onnx#7577

... (truncated)

Commits

• be2b5fd Update VERSION_NUMBER to final release version (#7772)
• c751ddb Update VERSION_NUMBER to rc4 (#7759)
• 866038e [rel-1.21.0] Cherry-pick bug and security fixes for RC4 (#7737, #7751) (#7758)
• e6c12c5 update version to rc3 (#7743)
• 33afebf Cherry pick commit (#7740)
• a51ac07 update release to rc2 (#7732)
• 089fcda fix windows build ; upload (#7727)
• fbbe45b Cherry pick commits into the release branch (#7718)
• 624108e update release branch version to 1.21.0rc1 (#7714)
• b65e6e1 [Cherry-Pick] Merge commits from main for security fixes (#7688)
• Additional commits viewable in compare view

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