feat: Enable system-upgrade-controller and pin k3s version

Signed-off-by: Devin Buhl <devin@buhl.casa>

cluster/apps/kustomization.yaml

@@ -6,4 +6,4 @@ resources:
   - flux-system
   - kube-system
   - networking
-  # - system-upgrade
+  - system-upgrade

cluster/apps/system-upgrade/system-upgrade-controller/plans/agent.yaml

@@ -9,7 +9,8 @@ metadata:
 spec:
   serviceAccountName: system-upgrade
   concurrency: 1
-  channel: https://update.k3s.io/v1-release/channels/v1.24
+  # renovate: datasource=github-releases depName=k3s-io/k3s
+  version: "v1.24.3+k3s1"
   nodeSelector:
     matchExpressions:
       - key: node-role.kubernetes.io/master

cluster/apps/system-upgrade/system-upgrade-controller/plans/server.yaml

@@ -7,7 +7,8 @@ metadata:
 spec:
   serviceAccountName: system-upgrade
   concurrency: 1
-  channel: https://update.k3s.io/v1-release/channels/v1.24
+  # renovate: datasource=github-releases depName=k3s-io/k3s
+  version: "v1.24.3+k3s1"
   cordon: true
   nodeSelector:
     matchExpressions: