fix(rolling-upgrades pipeline): Change default post_behavior of rolling-upgrades to destroy
fix(rolling-upgrades pipeline): Change default post_behavior of rolling-upgrades to destroy

Rolling upgrade test is too fragile, leaving behind too many instances.

scylladb/scylla-longevity-tests,scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests