Turn fork PR into local branch PR that can run CI with secrets #3434

Github Actions does not allow running CI for PRs from forks, as a user could extract secrets and other credentials by sending them to a remote location in the code. That makes sense and is a good default.

But sometimes it would be neat to be able to do that anyway: The diff of the PR is small enough to be reviewed, and then you are just missing a button to trigger that CI to double check that your tests are still passing.

An example: https://github.com/prisma/e2e-tests/pull/664

Refined Github could offer a button "Turn fork PR into local PR" or similar, that creates a new PR with the same code changes as the PR from the fork, a "closes #123" for the original PR and adds appropriate Co-Authored by attribution to the commit message or PR content.

This PR would get a normal CI run and could be safely merged with confidence.