[FRONTEND][ONNX] Extend axes for layer_norm when gamma/beta are multi-dimensional #18143
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mshr-h
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…-dimensional (apache#18143) * Extend axes for layer_norm when gamma/beta are multi-dimensional * Add testcase for layer_norm when gamma/beta are multi-dimensional * fix lint * fix lint
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This PR fixes #18136, which enhances the layer_norm operator to automatically extend the normalization axes when gamma and beta parameters are multi-dimensional tensors.