Limit non-stable releases to RCs on updater form

What is the current behavior of update.module's UI with respect to alpha/beta/RC?

We have \Drupal\automatic_updates\Validator\VersionPolicy\TargetVersionStable
but this only applies for cron

We actually test that pre-release shows up for the next minor in \Drupal\Tests\automatic_updates\Functional\UpdaterFormTest::testNextMinorPreRelease but we don't test alpha. I think an alpha would show for the next release

I think we at least need to allow updating to RC releases of the next minor because otherwise you would have a very narrow window in which you could update from you current minor to current minor +2. I would think we would want that so people could rely on cron updates from 1 year.

Duplicate of 📌 Should we only show RC for pre-releases of core in the form? Active