Disable customizing of Flux controllers

In preparation to install Flux 0.17.2, ensure that no kustomization
overlay rewrites the version of kustomize-controller or any other Flux
controllers.

I'll be installing this version that came from before SSA to test
upgrading through Flux SSA versions to the latest RC, can proceed
smoothly, and not fall victim anymore to fluxcd/kustomize-controller#486

clusters/moo-cluster/flux-system/kustomization.yaml

@@ -4,13 +4,13 @@ resources:
 - gotk-components.yaml
 - gotk-sync.yaml
 - flux-sync.yaml
-images:
-  - name: ghcr.io/fluxcd/kustomize-controller
-    newName: ghcr.io/fluxcd/kustomize-controller
-    newTag: rc-3f36db07
-  - name: ghcr.io/fluxcd/source-controller
-    newName: kingdonb/source-controller
-    newTag: 382e812
+images: []
+#  - name: ghcr.io/fluxcd/kustomize-controller
+#    newName: ghcr.io/fluxcd/kustomize-controller
+#    newTag: rc-3f36db07
+#  - name: ghcr.io/fluxcd/source-controller
+#    newName: kingdonb/source-controller
+#    newTag: 382e812
 patches: []
 #  - target:
 #      version: v1