Update close stale pull requests workflow to use cron (#20449)
Update close stale pull requests workflow to use cron (#20449)

* add workflow to auto close stale PRs

* bump state limit to 120 days, add label

* update time to label stale, add do not archive label

* modify close PR workflow to allow for testing via a workflow_dispatch

* update workflow to use cron job now that testing is done
department-of-veterans-affairs/vets-website,department-of-veterans-affairs/vets-website