scsi: scsi_debug: Abort SCSI commands via an internal command

scsi: scsi_debug: Abort SCSI commands via an internal command

Add a .queue_reserved_command() implementation and call it from the code
path that aborts SCSI commands. This ensures that the code for
allocating a pseudo SCSI device and also the code for allocating and
processing reserved commands gets triggered while running blktests.

Most of the code in this patch is a modified version of code from John
Garry. See also
https://lore.kernel.org/linux-scsi/75018e17-4dea-4e1b-8c92-7a224a1e13b9@oracle.com/

Reviewed-by: John Garry <john.g.garry@oracle.com>
Suggested-by: John Garry <john.g.garry@oracle.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://patch.msgid.link/20251031204029.2883185-8-bvanassche@acm.org
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>