What would you like to be added:
statefulset/cloneset/sidecarset/job need to add metric with replica, available, unavailable, complete, number of resource .....

Why is this needed:
For example, Deploy has kube-state-metric, which can provide the metric, so we can well count and monitor it in Prometheus. Kruise'

$ vela install
- Installing Vela Core Chart:
Error: rendered manifests contain a resource that already exists. Unable to continue with install: ScopeDefinition "healthscopes.core.oam.dev" in namespace "" exists and cannot be imported into the current release: invalid ownership metadata; label validation error: missing key "app.kubernetes.io/managed-by": must be set to "Helm"; annotation val

Is your feature request related to a problem? Please describe.

Updating escalator config currently requires a pod restart. We should update escalator to automatically read new config upon changing on disk.

Describe the solution you'd like

Check for changes in nodegroup config before each run. If safe to do so, run with the new config.

*Describe alternatives you've considered