iotests: adapt test output for new qemu_cleanup() behavior

iotests: adapt test output for new qemu_cleanup() behavior

Since commit ca2a5e630d ("qemu_cleanup: begin drained section after
vm_shutdown()"), there will be an additional pause for jobs during
qemu_cleanup(). The reason is that the bdrv_drain_all() call in
do_vm_stop() is not inside the drained section used by qemu_cleanup()
anymore. I.e., there is a second drained section now that ends before
the final one in qemu_cleanup() starts. Thus, job_pause() is called
twice during cleanup (via child_job_drained_begin()).

Test 185 needs to be adapted directly too, because it waits for a
specific number of JOB_STATUS_CHANGE events before the
BLOCK_JOB_CANCELLED event.

Reported-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Message-ID: <20230817112538.255111-1-f.ebner@proxmox.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>