Resize: custom axes attribute expansion (8 tests)

[antimora]

Summary

Resize rejects models using the axes attribute (opset 18+). 8 tests skip-codegen.

Error

Node 'resize1' (Resize): Invalid attribute 'axes': custom axes attribute is not supported

Example tests

• test_resize_downsample_sizes_nearest_not_smaller
• test_resize_tf_crop_and_resize_axes_2_3
• test_resize_tf_crop_and_resize_axes_3_2
• test_resize_upsample_scales_cubic_asymmetric_axes_2_3

Proposed fix

Same pattern as the Pad axes static-expansion that already landed (onnx-ir pad.rs::expand_axes_pads_to_full): when axes is a static attribute, expand the per-axis scales / sizes / roi to full-rank (identity = 1.0 scale / unchanged size / full roi on unlisted axes) at IR time, then feed the full-rank values to existing codegen.

Refs

• Scoreboard skip analysis: 656 onnx2burn codegen failures — ~200 are fixable config restrictions on supported ops #314 — parent scoreboard issue