tests: Switch total-order-check onto strong_ordering
tests: Switch total-order-check onto strong_ordering

This helper uses int_or_strong_ordering to facilitate vector
ordering checks. The rework is straightforward.

Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@scylladb.com>

scylladb/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla