Merge pull request #1131 from jimmylaw21:dnn-onnx-add-group-norm-layer

* put-gput group norm tests into conformance opencv_extra

Attention: The data provided here differ from the original data found in onnx/onnx/backend/test/data/node. In response to the issue outlined in [ONNX Issue #5466](onnx/onnx#5466), I have generated new input and output datasets for the OpenCV test data. It's important to note that the tensor shape of the scale and bias are based on the C (channels) parameter.

* change onnx model

* Synchronize with onnx issue 5808

Author: jimmylaw21

testdata/dnn/onnx/conformance/node/test_group_normalization_epsilon/model.onnx

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testdata/dnn/onnx/conformance/node/test_group_normalization_example/test_data_set_0/input_0.pb

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