Instruct helm to keep workload groups around on deletion (istio#3592)

* Instruct helm to keep workload groups around on deletion

* Add release notes

Author: liamawhite

kubernetes/customresourcedefinitions.gen.yaml

@@ -81,7 +81,8 @@ option go_package = "istio.io/api/networking/v1alpha3";
 //
 // <!-- crd generation tags
 // +cue-gen:WorkloadGroup:groupName:networking.istio.io
-// +cue-gen:WorkloadGroup:versions:v1beta1,v1alpha3,v1
+// +cue-gen:WorkloadGroup:versions:v1,v1beta1,v1alpha3
+// +cue-gen:WorkloadGroup:annotations:helm.sh/resource-policy=keep
 // +cue-gen:WorkloadGroup:labels:app=istio-pilot,chart=istio,heritage=Tiller,release=istio
 // +cue-gen:WorkloadGroup:subresource:status
 // +cue-gen:WorkloadGroup:scope:Namespaced

networking/v1/workload_group_alias.gen.go

@@ -0,0 +1,6 @@
+apiVersion: release-notes/v2
+kind: bug-fix
+area: installation
+releaseNotes:
+- |
+  **Added** Added missing helm.sh/resource-policy=keep annotation to WorkloadGroup CRD