onnxruntime

Add validation of op registrations (#5817)

* Add validation of operator registrations to the reduction script
  - the script has all the logic to process the registrations, and there's a CI that uses it

Fix some operator registrations

* Fix CUDA PRelu registration

* Refactor to split out kernel registration file parsing and use in the exclude ops script and an op registration validation script.
Run op validation in minimal build CI

* Fix PEP8 error and some comments