kvm: Support exporter for disk-type=ide

kvm-exporter supported only disk-type=virtio, as qemuqmpclient.driveBackup
source_drive defaults to virtio0.

For disk-type=ide the source_drive found to be ide0-hd0 by query-block during
runtime, and as it's used, now such disk type is supported.
12 jobs for 1.0 in 0 seconds (queued for 1 second)
Status Job ID Name Coverage
  External
passed SlapOS.Eggs.UnitTest-Master.Python2

00:12:08

passed SlapOS.Eggs.UnitTest-Master.Python3

00:23:39

passed SlapOS.SlapRunner.ResilienceTest-Master

00:22:32

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

00:33:12

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python2

06:06:44

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python3

06:55:37

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

14:42:47

passed SlapOS.Eggs.UnitTest-Master.Python2

00:20:30

passed SlapOS.Eggs.UnitTest-Master.Python3

00:18:14

passed SlapOS.SlapRunner.ResilienceTest-Master

00:23:37

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

02:41:41

failed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master

15:05:40