scsi: target: core: Kill transport_handle_cdb_direct()

Move the code from transport_handle_cdb_direct() to target_submit() and
have iSCSI call target_submit().

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Link: https://lore.kernel.org/r/20230928020907.5730-5-michael.christie@oracle.com


Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>