Add support for ipv6 only cluster via "enable_ipv6only_stack_networks" (#11831)

.gitlab-ci/vagrant.yml

@@ -36,6 +36,14 @@
       - .cache/pip
     policy: pull-push # TODO: change to "pull" when not on main
 
+vagrant_ubuntu24-calico-ipv6only-stack:
+  stage: deploy-extended
+  extends: .vagrant
+  rules:
+    - if: $PR_LABELS =~ /.*(ci-extended|ci-full).*/
+      when: on_success
+  allow_failure: false
+
 vagrant_ubuntu20-calico-dual-stack:
   stage: deploy-extended
   extends: .vagrant