fix: entries not found

Description

If specified ZFS pool had no slash in its name filesystem state information could not be gathered. Which resulted in an error in a status request.

Examples

GetDiskState: Cannot get disk state. Pool entries not found.

NAME                      MOUNTPOINT
zfspool                   /zfspool
zfspool@db_state_1        -
zfspool/dblab_clone_6000  /var/lib/postgresql/dblab/clones/dblab_clone_6000

Checklist

• the MR description has been reviewed
• this MR contains text changes and they have been reviewed OR there are no texts changes
• this MR contains GUI/CLI changes and they have been reviewed OR there are no GUI/CLI changes
• this MR contains API changes and they have been reviewed OR there are no API changes