Merge branch '1267-enable-alpha-plugins-by-default-in-argocd' into 'master'

Resolve "Enable alpha plugins by default in ArgoCD"

Closes #1267

See merge request platform-one/big-bang/bigbang!2076

chart/templates/argocd/values.yaml

@@ -77,6 +77,9 @@ redis-bb:
 server:
   image: 
     imagePullPolicy: {{ .Values.imagePullPolicy }}
+  config:
+    # Must be enabled for plugins included in PlatformOne image.
+    kustomize.buildOptions: "--enable-alpha-plugins"
 
 repoServer:
   image: