fix(kubernetes_cmd_runner.py): fix run for 'sudo -u scylla' case
fix(kubernetes_cmd_runner.py): fix run for 'sudo -u scylla' case

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