refactor(system): remove Rocky upgrade from system upgrade controller

Use kured instead

system/system-upgrade/kustomization.yaml

@@ -3,6 +3,4 @@ kind: Kustomization
 
 resources:
   - https://github.com/rancher/system-upgrade-controller/releases/download/v0.8.1/system-upgrade-controller.yaml
-  # TODO re-enable rolling upgrade
-  # - k3s
-  # - rocky-linux
+  - k3s

system/system-upgrade/rocky-linux/kustomization.yaml

@@ -1,9 +0,0 @@
-apiVersion: kustomize.config.k8s.io/v1beta1
-kind: Kustomization
-
-resources:
-  - upgrade.yaml
-
-commonAnnotations:
-  # TODO https://github.com/rancher/system-upgrade-controller/issues/172
-  argocd.argoproj.io/sync-options: SkipDryRunOnMissingResource=true

system/system-upgrade/rocky-linux/upgrade.yaml

@@ -1,38 +0,0 @@
-apiVersion: v1
-kind: Secret
-metadata:
-  name: rocky-upgrade
-  namespace: system-upgrade
-type: Opaque
-stringData:
-  upgrade.sh: |
-    #!/bin/sh
-    set -e
-    dnf upgrade -y
-    command -v needs-restarting || dnf install -y dnf-utils
-    needs-restarting --reboothint || reboot
----
-apiVersion: upgrade.cattle.io/v1
-kind: Plan
-metadata:
-  name: rocky-upgrade
-  namespace: system-upgrade
-spec:
-  serviceAccountName: system-upgrade
-  secrets:
-    - name: rocky
-      path: /host/run/system-upgrade/secrets/rocky
-  upgrade:
-    image: rockylinux
-    command:
-      - chroot
-      - /host
-    args:
-      - sh
-      - /run/system-upgrade/secrets/rocky/upgrade.sh
-  concurrency: 1
-  cordon: true
-  drain:
-    force: true
-    skipWaitForDeleteTimeout: 300  # Honor PodDisruptionBudgets
-  version: "20220123"  # TODO dummy value