make onnx expect tests resiliant to producer_version changes (#39002)
Summary:
closes gh-32561 closes gh-38545. As part of the fallout from gh-36797, this PR
- replaces the producer_version: "1.6" in onnx expect tests with `producer_version: "XXX"
- adapts `testing/_internal/common_utils.py` with a regex to change the onnx producer_version so tests still pass
The consistency of the torch version and the onnx `producer_version` is tested in gh-36797, so there is no reason to test it again in the expect tests.
xref gh-38629 which documented how to run the onnx tests and at the same time refactored the Community documentation.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/39002
Differential Revision: D21723062
Pulled By: ezyang
fbshipit-source-id: 1bd6a8ed37d5383e69d017226dc09c0645a69aff
