Re-enable disabled tests workflow with GHA (#55417)
Summary:
Replace the old (and disabled) workflow to update disabled tests with a GitHub Action that would gather a list of disabled tests and export them to our test-infra repo.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/55417
Test Plan: This [workflow](https://github.com/janeyx99/gha-experiments/runs/2282792158?check_suite_focus=true) has successfully pushed, resulting in this file: https://github.com/pytorch/test-infra/blob/master/stats/.pytorch-disabled-tests
Reviewed By: walterddr
Differential Revision: D27608584
Pulled By: janeyx99
fbshipit-source-id: b9dc184712484ef4806f24a34670390f723824bc
