remove host-operator config from stage-p01 (#7431)

Sandbox's host-operator has been removed from stone-stage-p01, so none
of these resources are needed anymore.  However, we can't have an empty
Application in argo, since it will begin complaining about an empty
kustomization manifest.  Until the remaining staging clusters have also
had host-operator migrated, remove everything but the
toolchain-host-operator namespace.

Signed-off-by: Andy Sadler <[email protected]>

Author: sadlerap

components/sandbox/toolchain-host-operator/staging/stone-stage-p01/kustomization.yaml

@@ -1,16 +1,5 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
+namespace: toolchain-host-operator
 resources:
-- ../../base
-- toolchainconfig.yaml
-- space-provisioner-configs.yaml
-- network-policy.yaml
-- ../../../tiers/staging
-patches:
-- patch: |
-    $patch: delete
-    apiVersion: operators.coreos.com/v1alpha1
-    kind: Subscription
-    metadata:
-      name: dev-sandbox-host
-      namespace: toolchain-host-operator
+- ns.yaml

components/sandbox/toolchain-host-operator/staging/stone-stage-p01/network-policy.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: toolchain-host-operator