When no keyspace is provided, request all keyspaces from the server,
then scrub all of them. This is what the legacy nodetool does, for some
reason this was missed when re-implementing scrub.
Closesscylladb/scylladb#17495
On top of the capabilities of the java-nodetool command, the following
additional functionalit is implemented:
* Expose quarantine-mode option of the scrub_keyspace REST API
* Exit with error and print a message, when scrub finishes with abort or
validation_errors return code