Removes the designate, designate-bind, designate-mysql-router,
               and designate-hacluster applications, plus all seven designate-
               related relations. Updates header comments to reflect the deferral.

               Rationale per D-019: v1 testcloud topology investigation confirmed
               outside-in DNS is not needed (corporate clients reach the cloud via
               the openstack.baldurkeep.com HTTPS proxy chain, not via *.cloud.
               neumatrix.local FQDNs). Tenant subnets use public DNS directly via
               --dns-nameserver. FIP DNS auto-registration is not load-bearing for
               any v1 acceptance criterion.

               VIP 10.12.4.227 becomes unused space in 10.12.4.224-.254 (same
               status as 10.12.4.225 reserved for v2 ceph-radosgw HA).