LU-16952 debug: use right io object to check

LU-16952 debug: use right io object to check

cp_owner is io_top(io) not an io itself,
let's fix it to make invariants happy.

HPe-bug-id: LUS-11707
Test-Parameters: trivial
Signed-off-by: Alexey Lyashkov <alexey.lyashkov@hpe.com>
Change-Id: Ib473e8616e2c339fd54cd96af7933e437e8f5869
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/51676
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Patrick Farrell <pfarrell@whamcloud.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>