Add --primary-replica-only and update docs page for
nodetool restore.
The relationship with the scope parameter is:
- scope=all primary_replica_only=true gets the global primary replica
- scope=dc primary_replica_only=true gets the local primary replica
- scope=rack primary_replica_only=true is like a noop, it gets the only
replica in the rack (rf=#racks)
- scope=node primary_replica_only=node is not allowed
Fixes#26584
Signed-off-by: Robert Bindar <robert.bindar@scylladb.com>
c1b3fe30be