Promote these metrics to be STABLE

**What would you like to be added**:
- kube_cronjob_status_last_successful_time
- kube_pod_container_resource_requests
- kube_pod_container_resource_limits
- kube_cronjob_labels
- kube_horizontalpodautoscaler_status_target_metric

**Why is this needed**:

**Describe the solution you'd like**

**Additional context**