add(longevity-twcs-48h.yaml) new test
add(longevity-twcs-48h.yaml) new test

Add twcs test, test does:
*run time windows load with scylla-bench
*run nemesis on scylla cluster

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