storage_service: Implement on_leave_cluster in excise
storage_service: Implement on_leave_cluster in excise

raphaelsc/scylla,kjniemi/scylla,avikivity/scylla,kjniemi/scylla,scylladb/scylla,avikivity/scylla,duarten/scylla,scylladb/scylla,scylladb/scylla,duarten/scylla,kjniemi/scylla,duarten/scylla,raphaelsc/scylla,avikivity/scylla,scylladb/scylla,raphaelsc/scylla