Allow administrators to disable email notification sending on license expiration

Patch #7 re-rolled for version 3.0.x-dev.

Patch in #9 works fine for me in the dev version of commerce license thank you 🙏

I would suggest to change the job result from "failure" to "success" because it's a wanted result by design.

Set this to Major because this issue has impact on side-wide UX, because of sending emails to users without permission by admin.