[ONNX] Export Relu6 without using Relu (#99022)
The clamp operator used in the export of Relu6 already clamps the input value in between 0 and 6. There's no need to first perform a Relu on the input tensor.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/99022
Approved by: https://github.com/BowenBao
