storage_service: Enable node repair based ops for decommission
storage_service: Enable node repair based ops for decommission

- Decommission operation

It is used to remove a live node form the cluster. Token ring
changes.  Do not suffer “not the latest replica” issue. The leaving
node pushes data to existing nodes.

Fixes: #3003
Fixes: #4208
Tests: update_cluster_layout_tests.py + replace_address_test.py + manual test

avikivity/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla