Fix shape infer of onnx GroupNorm (#23477)
### Description
<!-- Describe your changes. -->
Fix shape infer of onnx GroupNorm.
### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->
Unable to run shape inference for onnx `GroupNorm`.
[model.onnx](https://raw.githubusercontent.com/onnx/onnx/refs/heads/main/onnx/backend/test/data/node/test_group_normalization_example/model.onnx)
> python
D:\source\cognition\onnxruntime\onnxruntime\python\tools\symbolic_shape_infer.py
--input model.onnx
Traceback (most recent call last):
File
"D:\source\cognition\onnxruntime\onnxruntime\python\tools\symbolic_shape_infer.py",
line 2999, in <module>
out_mp = SymbolicShapeInference.infer_shapes(
File
"D:\source\cognition\onnxruntime\onnxruntime\python\tools\symbolic_shape_infer.py",
line 2935, in infer_shapes
raise Exception("Incomplete symbolic shape inference")
