Automate waiting for images to build

[mkolesnik]

We currently have an ability to detect if any open PRs from a previous stage are still open.
On the same note, we could detect if necessary images are finished building.

We could either try to query the jobs on the CI, or piggy back on the dependency tracking bot.
For this, image building jobs for projects that build images for a specific tag could open an automated issue when they start, and close it when the job ends successfully.
We could then use "Depends on" (similar to #457) on the PR created by make release to track these "tracker" issues.

The only problem is that the E2E would still fail, but that could easily be manually re-run (and perhaps this can be further automated in the future).

[stale]

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