Test site may be destroyed while an (automated) cron is still running

Can I asked where 900 came from?

I just used that because it's the same as what is used in \Drupal\Core\Cron::run() so it seemed appropriate.

That’s fair. No objections to the rest of the changes.

I think we might want to make this even more special cased and do a ::moduleExists('automated_cron') first - nothing else should run cron in an end of request task.

There are other things that can happen end of request too, but:

- they should be a lot quicker than a cron run
- I can't think of any way to generically handle those, except for breaking end of request processing for everyone including outside tests.

That's fair enough, updated the patch accordingly. Updated the patch for Config Overlay, as well, and the passing pipeline proves that this still works: https://git.drupalcode.org/project/config_overlay/-/merge_requests/44