Make lscsi more verbose, and cut down on typing

This makes the new functionality added by @ror6ax in #16323 more verbose. Previously the output looked like:
```
[0:0:0:0]    disk    ATA      HGST HTS725050A7 GH2Z  /dev/sda 
[1:0:0:0]    disk    ATA      WDC WD5000BPVT-2 01.0  /dev/sdb 
```
Now the output looks like:
```
{'local': {'[0:0:0:0]': {'device': '/dev/sda',
                         'device_blocked': '0',
                         'dir': ['/sys/bus/scsi/devices/0:0:0:0',
                                 '/sys/devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0/0:0:0:0'],
                         'iocounterbits': '32',
                         'iodone_cnt': '0x1c1bbee',
                         'ioerr_cnt': '0x5d7b',
                         'iorequest_cnt': '0x1c6753a',
                         'lun': '0:0:0:0',
                         'major': '8',
                         'minor': '0',
                         'model': 'HGST HTS725050A7 GH2Z',
                         'queue_depth': '31',
                         'queue_type': 'simple',
                         'scsi_level': '6',
                         'size': '500GB',
                         'state': 'running',
                         'timeout': '30',
                         'type': '0'},
           '[1:0:0:0]': {'device': '/dev/sdb',
                         'device_blocked': '0',
                         'dir': ['/sys/bus/scsi/devices/1:0:0:0',
                                 '/sys/devices/pci0000:00/0000:00:1f.2/ata2/host1/target1:0:0/1:0:0:0'],
                         'iocounterbits': '32',
                         'iodone_cnt': '0x303f0f',
                         'ioerr_cnt': '0x4eef',
                         'iorequest_cnt': '0x311e12',
                         'lun': '1:0:0:0',
                         'major': '8',
                         'minor': '16',
                         'model': 'WDC WD5000BPVT-2 01.0',
                         'queue_depth': '31',
                         'queue_type': 'simple',
                         'scsi_level': '6',
                         'size': '500GB',
                         'state': 'running',
                         'timeout': '30',
                         'type': '0'}}}
```
I also changed the function name from `scsi.lsscsi` to `scsi.ls`, which cuts down on typing.