Cannot pass `prometheusMonitor` config via `--set` to GreptimeDB Cluster CRD

[shawnh2]

creating a bare-metal cluster using:

./bin/gtctl cluster create mycluster -n default \
  --set cluster.prometheusMonitor.enabled=true \
  --set cluster.prometheusMonitor.path=/metrics \
  --set cluster.prometheusMonitor.port=http \
  --set cluster.prometheusMonitor.interval=20s \
  --set cluster.prometheusMonitor.honorLabels=true \
  --set cluster.prometheusMonitor.labelsSelector.release=prometheus \
  --set cluster.postgresServicePort=4444

the result GreptimeDB Cluster CRD suggests the prometheusMonitor field is not be set, even though there's prometheusMonitor field sets in generated manifest: