Volunteer deactivation notification recipients

For the established (legacy) Volunteer Management portal. These steps differ from the newer Volunteer Management interface. Administrator controls require the appropriate school or volunteer-management permissions.

In the legacy VMS deactivation/unpair workflow, the deactivation email and onsite notification go to the volunteer's administrator handlers, not to the volunteer. Distinguish this from assignment-removal messaging and verify the workflow when using a newer role-deactivation interface.