User interface: `--debug` and `--verbose` not informative

[sabaini]

We have a --verbose and a --debug flag for microceph, but they're not really doing much for some commands, e.g.

ubuntu@vm-0:~$ sudo microceph disk list
Disks configured in MicroCeph:
+-----+----------+-----------------------------------------------------------+
| OSD | LOCATION |                           PATH                            |
+-----+----------+-----------------------------------------------------------+
| 0   | vm-0     | /dev/disk/by-id/scsi-SQEMU_QEMU_HARDDISK_lxd_vm--0--disk0 |
+-----+----------+-----------------------------------------------------------+
| 1   | vm-1     | /dev/disk/by-id/scsi-SQEMU_QEMU_HARDDISK_lxd_vm--1--disk0 |
+-----+----------+-----------------------------------------------------------+
| 2   | vm-2     | /dev/disk/by-id/scsi-SQEMU_QEMU_HARDDISK_lxd_vm--2--disk0 |
+-----+----------+-----------------------------------------------------------+

Available unpartitioned disks on this system:
+-------+----------+------+------+
| MODEL | CAPACITY | TYPE | PATH |
+-------+----------+------+------+
ubuntu@vm-0:~$ sudo microceph disk list -v
Disks configured in MicroCeph:
+-----+----------+-----------------------------------------------------------+
| OSD | LOCATION |                           PATH                            |
+-----+----------+-----------------------------------------------------------+
| 0   | vm-0     | /dev/disk/by-id/scsi-SQEMU_QEMU_HARDDISK_lxd_vm--0--disk0 |
+-----+----------+-----------------------------------------------------------+
| 1   | vm-1     | /dev/disk/by-id/scsi-SQEMU_QEMU_HARDDISK_lxd_vm--1--disk0 |
+-----+----------+-----------------------------------------------------------+
| 2   | vm-2     | /dev/disk/by-id/scsi-SQEMU_QEMU_HARDDISK_lxd_vm--2--disk0 |
+-----+----------+-----------------------------------------------------------+

Available unpartitioned disks on this system:
+-------+----------+------+------+
| MODEL | CAPACITY | TYPE | PATH |
+-------+----------+------+------+
ubuntu@vm-0:~$ sudo microceph disk list -d
Disks configured in MicroCeph:
+-----+----------+-----------------------------------------------------------+
| OSD | LOCATION |                           PATH                            |
+-----+----------+-----------------------------------------------------------+
| 0   | vm-0     | /dev/disk/by-id/scsi-SQEMU_QEMU_HARDDISK_lxd_vm--0--disk0 |
+-----+----------+-----------------------------------------------------------+
| 1   | vm-1     | /dev/disk/by-id/scsi-SQEMU_QEMU_HARDDISK_lxd_vm--1--disk0 |
+-----+----------+-----------------------------------------------------------+
| 2   | vm-2     | /dev/disk/by-id/scsi-SQEMU_QEMU_HARDDISK_lxd_vm--2--disk0 |
+-----+----------+-----------------------------------------------------------+

Available unpartitioned disks on this system:
+-------+----------+------+------+
| MODEL | CAPACITY | TYPE | PATH |
+-------+----------+------+------+