Foreman » Installer

Fixes #32175: Allow toggling task backup when cleaning them up

Changes the default behavior to disable task backup when enabling
the task cleanup cron job. Users who still want backups kept
on disk will need to set the parameter to true.

Refs #32175: Set foreman-tasks backup to true on upgrades

For new installations, the intent is to default to task cleanup
to not store backups of the tasks deleted. Since the previous
behavior is to store backups on cleanup, when upgrading users
should retain the same behavior and intentionally disable backups
to prevent unexpected behavior changes.