GitLab

Summary:
Create a standalone GitHub Actions workflow for Docstring Sync. This job (https://app.circleci.com/pipelines/github/pytorch/audio/12625/workflows/96223ad2-0fcd-4dae-a045-d530aaf9b55c/jobs/907466) currently depends on linux wheels builds, which creates a dependency that makes the migration to Nova trickier. This PR creates a fresh standalone workflow for this job that is triggered per-PR and before nightly/release cuts.

Pull Request resolved: https://github.com/pytorch/audio/pull/2720

Reviewed By: izaitsevfb, seemethere

Differential Revision: D39863574

Pulled By: osalpekar

fbshipit-source-id: 8599dc006693242278857a3dedeb4fddc1eed14b