Enlarge timeout in `RestartThenRepairNode` nemesis to 8 hours (#1441)
Enlarge timeout in `RestartThenRepairNode` nemesis to 8 hours (#1441)

In multiple nemesis test when we have 2TB of data steaming can
more then 4 hours, raising the limit above that.
scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-longevity-tests,scylladb/scylla-longevity-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests