deletion prevention

[ofirshtrull]

Summary

by mistake last week I almost made a change that could have deleted a full applicationset in my prod
(Luckey it was stoped in pr)
I think maybe we a new annotation can be added to applicationsets and applications that if there it will prevent a deletion on the argo resource

Motivation

such as

apiVersion: argoproj.io/v1alpha1
kind: ApplicationSet
metadata:
  name: test
  namespace: argocd
  label: 
    deletion_prevention: true
spec:
  generators:

or don't have two ApplicationSet/Applications with the same name and having the new one by mistake delete the old one

[crenshaw-dev]

I think this is a duplicate of #11073

Let me know if I'm wrong!