feat(argo-cd): add support for dual stack clusters (#2649)

* feat(argo-cd): add support for dual stack clusters

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>

* fix: add suggested change

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>

* fix: metric template & add suggested change

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>

* fix: remove changelog in README.md.gotmpl

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>

* fix: applicationset metric template

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>

* fix: add changelog as annotation

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>

* feat: use a global setting to enable dual stack

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>

---------

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>
Signed-off-by: Marco Maurer (-Kilchhofer) <mkilchhofer@users.noreply.github.com>
Co-authored-by: Aikawa <yu.croco@gmail.com>
Co-authored-by: Marco Maurer (-Kilchhofer) <mkilchhofer@users.noreply.github.com>

charts/argo-cd/values.yaml

@@ -98,6 +98,13 @@ global:
   #   hostnames:
   #   - git.myhostname
 
+  # Configure dual-stack used by all component services
+  dualStack:
+    # -- IP family policy to configure dual-stack see [Configure dual-stack](https://kubernetes.io/docs/concepts/services-networking/dual-stack/#services)
+    ipFamilyPolicy: ""
+    # -- IP families that should be supported and the order in which they should be applied to ClusterIP as well. Can be IPv4 and/or IPv6.
+    ipFamilies: []
+
   # Default network policy rules used by all components
   networkPolicy:
     # -- Create NetworkPolicy objects for all components