fix(flux): add prune disable patches

I wonder how well those nested patches will work

kube/clusters/sinon/flux/flux-repo.yaml

@@ -29,10 +29,11 @@ metadata:
     kustomization.flux.home.arpa/default: "false"
     wait.flux.home.arpa/disabled: "true"
     kustomization.flux.home.arpa/helmpatches: "false"
+    kustomization.flux.home.arpa/prunepatches: "false"
 spec:
   interval: 5m0s
   path: ./kube/clusters/sinon/flux
-  prune: false
+  prune: true
   wait: false
   sourceRef:
     kind: GitRepository
@@ -57,6 +58,12 @@ spec:
       #   name: sinon-versions
       #   optional: false
   patches:
+    - patch: |-
+        - op: add
+          path: "/metadata/labels/kustomize.toolkit.fluxcd.io~1prune"
+          value: "disabled"
+      target:
+        kind: Namespace
     - patch: |-
         apiVersion: kustomize.toolkit.fluxcd.io/v1
         kind: Kustomization
@@ -218,6 +225,29 @@ spec:
         version: v1
         kind: Kustomization
         labelSelector: wait.flux.home.arpa/disabled=true
+    - patch: |-
+        apiVersion: kustomize.toolkit.fluxcd.io/v1
+        kind: Kustomization
+        metadata:
+          name: not-used
+        spec:
+          patches:
+            - patch: |-
+                - op: add
+                  path: "/metadata/labels/kustomize.toolkit.fluxcd.io~1prune"
+                  value: "disabled"
+              target:
+                kind: Namespace
+            - patch: |-
+                - op: add
+                  path: "/metadata/labels/kustomize.toolkit.fluxcd.io~1prune"
+                  value: "disabled"
+              target:
+                kind: PersistentVolumeClaim
+      target:
+        group: kustomize.toolkit.fluxcd.io
+        kind: Kustomization
+        labelSelector: kustomization.flux.home.arpa/prunepatches notin (false)
     - patch: |-
         apiVersion: kustomize.toolkit.fluxcd.io/v1
         kind: Kustomization