feat(pm/umber): enable RAID

We have some drives in umber that should be set up as a software RAID.

To do that, we need to enable this in the hardware config

packetmix/systems/umber/hardware-configuration.nix

···
     ];
   };
 
+  boot.swraid.enable = true;
+  boot.swraid.mdadmConf = ''
+    PROGRAM=true
+  ''; # Disable reporting for this system
+
   clicks.storage.impermanence = {
     enable = true;
     devices = {