Add icinga checks for SMART disk status

The smartmontools emails can be missed when they're sent only once and the disk gets kicked off its array.

We should add some more sticky notifications to icinga for failed/pre-failed disks.

https://github.com/thomas-krenn/check_smart_attributes looks like a decent candidate for such a check. The main sticking point will be generating the list of devices for which we want to add the check on each machine.

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Migrated from T3500 (view on Phabricator)