add cluster:controlplane_topology:info recording rule

This very simple recording rule is used as a telemetry signal. This is
best done via a recording rule so that non-relevant labels can be
aggregated and thus reduce the cardinality in our telemetry storage.

Signed-off-by: Jan Fajerski <[email protected]>

Author: jan--f

manifests/0000_90_kube-apiserver-operator_03_servicemonitor.yaml

@@ -55,3 +55,7 @@ spec:
       for: 10m
       labels:
         severity: warning
+  - name: cluster-topology
+    rules:
+      - expr: sum by(mode) (cluster_controlplane_topology)
+        record: cluster:controlplane_topology:info