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5f4a6b2b - [Transformer2DModel] Handle `norm_type` safely while remapping (#8370)

[Transformer2DModel] Handle `norm_type` safely while remapping (#8370) * handle norm_type of transformer2d_model safely. * log an info when old model class is being returned. * Apply suggestions from code review Co-authored-by: Dhruv Nair <dhruv.nair@gmail.com> * remove extra stuff --------- Co-authored-by: Dhruv Nair <dhruv.nair@gmail.com>