Look into github action to push PRs from forks to origin on review approval

Since the full integration test suite in this repo relies on sensitive keys, we cannot trust pull requests from branches not on this repo's origin. Someone could do something malicious with those keys. As such, for legit, non-malicious and well intentioned folks sending PRs to this repo, after reviewing the code, I have to push their code to a branch on this origin in order to trigger the full integration test suite.

Would be cool to automate this song-n-dance.

Could base it on something from here? https://github.com/sdras/awesome-actions#pull-requests

The issue names no repository files or tests; start by reviewing the linked awesome-actions pull-request examples and the repository's full integration-test setup. Done means automating the approved fork-PR flow onto an origin branch so the full suite can run without exposing sensitive keys.

Written by the indexing model from the issue text.