cluster: migrate to using pkg/rings for Addresses [WIP]

Signed-off-by: Alejandro Mery <amery@jpi.io>

pkg/cluster/env.go

@@ -185,7 +185,7 @@ func genEnvZoneCephMonNames(m Machines) string {
 func genEnvZoneCephMonIPs(m Machines) string {
 	var buf strings.Builder
 	m.ForEachMachine(func(p *Machine) bool {
-		addr, _ := RingOneAddress(p.Zone(), p.ID)
+		addr := p.RingOneAddress()
 
 		if buf.Len() > 0 {
 			_, _ = buf.WriteRune(' ')