Notify administrators if the users are blocked/IDLE for a long time

* Cloud Pipeline shall check the list of users who are blocked or "IDLE" for a long period of time. This shall allow to remove their data to minimize the storage costs and block those users, who are already not using the platform
* Two checks shall be performed:
* Users who are "IDLE" - did not login for a N days (included those, who never logged)
* Users who are Blocked for M days
* Users who are members of the group, which is Blocked for M days
* N and M shall be configurable via preferences
* This check shall be performed on a scheduled basis. Schedule shall be configurable via preferences
* If any users match the "IDLE/Blocked" criteria - a email notification shall be sent. Introduce a new email notification type, which shall support adding a list of the users as a table to the email body.
* This table shall contain the following information:
* User ID (meaning a "NameID", not an integer ID)
* Email (if available)
* User's default storage name (if available)
* Creation date/time
* Last login date/time
* Blocked date/time