storage_service: Use the same tokens as previous bootstrap
storage_service: Use the same tokens as previous bootstrap

With repair based node operations, we can resume previous failed
bootstrap. In order to do that, we need the bootstrap node uses the same
tokens as previous bootstrap.

Currently, we always use new tokens when we bootstrap, because we need
to stream all the ranges anyway. It does not matter if we use the same
tokens or not.

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