scsi: scsi_debug: Add read support and update locate for tapes

scsi: scsi_debug: Add read support and update locate for tapes

Support for the READ (6) and SPACE (6) commands for tapes based on the
previous write patch is added. The LOCATE (10) command is updated to use
the written data.

Signed-off-by: Kai Mäkisara <Kai.Makisara@kolumbus.fi>
Link: https://lore.kernel.org/r/20250213092636.2510-5-Kai.Makisara@kolumbus.fi
Reviewed-by: John Meneghini <jmeneghi@redhat.com>
Tested-by: John Meneghini <jmeneghi@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>