Add two new configuration option fields to the template settings page: templates/{template}/settings/schedule

• "Failure Cleanup" is a configuration option that specifies how long a failed workspace persists before it is stopped
• "Inactivity Cleanup" is a configuration option that specifies how long an inactive workspace persists before it is deleted - should be calculated from workspace.LastUsedAt

• note the labels in the attached mocks should be adjusted to match the language in this ticket

Hook these new configuration options up to the new route created in #7346
Hide behind feature flag created in #7354