chore(kube-thanos): Migrate to ArgoCD App of Applications

Move the ArgoCD Application resource definition to follow the ArgoCD App
of Applications pattern.

Author: ssoriche

platform/kube-thanos/do/application.yaml renamed to argocd-applications/do/kube-thanos.yaml

@@ -2,6 +2,5 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
 resources:
-  - ./application.yaml
   - ../base/
   - ./sealedsecret-thanos-objectstorage.yaml