feat(argo-cd): Add support for extension (#1050)

* add support for extension

Signed-off-by: Qing Ye <ye.qing@gojek.com>

* add volume mounts

Signed-off-by: Qing Ye <ye.qing@gojek.com>

* add RBAC

Signed-off-by: Qing Ye <ye.qing@gojek.com>

* add more control to extensions values and update readme

Signed-off-by: Qing Ye <ye.qing@gojek.com>

* remove trailing spaces in values file

Signed-off-by: Qing Ye <ye.qing@gojek.com>

* add missing extensions.enabled

Signed-off-by: Qing Ye <ye.qing@gojek.com>

* Update charts/argo-cd/Chart.yaml

Co-authored-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>
Signed-off-by: Qing Ye <ye.qing@gojek.com>

* add comment to extensions values

Signed-off-by: Qing Ye <ye.qing@gojek.com>

Co-authored-by: Qing Ye <ye.qing@gojek.com>
Co-authored-by: Marko Bevc <marko@scalefactory.com>
Co-authored-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>

charts/argo-cd/templates/argocd-server/extensions.yaml

@@ -0,0 +1,17 @@
+{{- if .Values.server.extensions.enabled }}
+{{- range $extension := .Values.server.extensions.contents }}
+---
+apiVersion: argoproj.io/v1alpha1
+kind: ArgoCDExtension
+metadata:
+  name: {{ $extension.name }}
+  finalizers:
+    - extensions-finalizer.argocd.argoproj.io
+  labels:
+    {{- include "argo-cd.labels" (dict "context" $ "component" $.Values.server.name "name" (printf "%s-extensions" $.Values.server.name)) | nindent 4 }}
+spec:
+  sources:
+  - web:
+      url: {{ $extension.url }}
+{{- end }}
+{{- end }}