t/verify-state.c: adjust to verify state format change

t/verify-state.c: adjust to verify state format change

The previous commit modified the format of verify state files. To adjust
to the change, add support of the new field "max_no_comps_per_file" and
pass it to __thread_io_list_sz(). Also check the version number against
the new version 4.

Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Link: https://lore.kernel.org/r/20250213052510.1474423-4-shinichiro.kawasaki@wdc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>