Allow the DNS stack to be backward compatible with an old dns_domain (#10630)

Handle all old dns domains:
- for nodelocaldns: in the same server block as the current dns_domain
- for coredns: uffix rewrite of each of the old dns domains to the
  current one

roles/kubernetes-apps/ansible/templates/coredns-config.yml.j2

@@ -49,6 +49,9 @@ data:
 {% if coredns_rewrite_block is defined %}
         {{ coredns_rewrite_block | indent(width=8, first=False) }}
 {% endif %}
+{% for old_dns_domain in old_dns_domains %}
+        rewrite name suffix {{ old_dns_domain }} {{ dns_domain }} answer auto
+{% endfor %}
         ready
         kubernetes {{ dns_domain }} {% if coredns_kubernetes_extra_domains is defined %}{{ coredns_kubernetes_extra_domains }} {% endif %}{% if enable_coredns_reverse_dns_lookups %}in-addr.arpa ip6.arpa {% endif %}{
           pods insecure