Fix ONNX operator_export_type on the new registry (#87735)
Fixes #87313
Our ONNX pipelines do not run with BUILD_CAFFE2=0, so tests for operator_export_type ONNX_ATEN and ONNX_ATEN_FALLBACK will not be fully tested, allowing regressions to happen again.
We need to run the same set of tests for both BUILD_CAFFE2=0 and 1
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87735
Approved by: https://github.com/AllenTiTaiWang, https://github.com/BowenBao
