ami: update verify of io.conf
ami: update verify of io.conf

The io.conf setup is changed from 2.3, the properties is moved to
/etc/scylla.d/io_properties.yaml

Signed-off-by: Amos Kong <eb01d8f828a6c9a20be4534e72e049aaf41503df@scylladb.com>

scylladb/scylla-artifact-tests,scylladb/scylla-artifact-tests