[RFC] Link test pipelines in testgrid with GitHub issues

It would be great if it is possible to link a test with a GitHub issue. Right now I'm serving in the Release Team CI Signal, and part of our doing is to look up for the flaky and failing test and raise issues to solve them. We have to manually check if these tests are already addressed in some GitHub issue, this can be inside or outside of our project dashboard.

This would increase the transparency of fixing upcoming issues and brings the testgrid and resolution process closer together.

From an implementation POV the best idea right now would be to extend testgrid by a component that can be configured to read open issues either from organizations and/or project boards. Therefore each pipeline requires a UID that can be addressed maybe within the headline (potentially alpha numeric to keep it short) or within the body of the issue.