Bug 2001411

Description of problem:
All critical alerts shipped as part of OpenShift need a proper runbook in [1] and a "runbook_url" annotation should be present in the alert definition as per [2].

[1] https://github.com/openshift/runbooks
[2] https://github.com/openshift/enhancements/blob/master/enhancements/monitoring/alerting-consistency.md#documentation-required

Version-Release number of selected component (if applicable):
4.9.0-0.nightly-2021-09-05-192114

How reproducible:
Always

Steps to Reproduce:
1. Look for all alerting rules with severity=critical
2.oc -n openshift-machine-api get prometheusrules machine-api-operator-prometheus-rules -oyaml|grep -B10 critical
  - name: machine-api-operator-metrics-collector-up
    rules:
    - alert: MachineAPIOperatorMetricsCollectionFailing
      annotations:
        message: 'machine api operator metrics collection is failing. For more details:  oc
          logs <machine-api-operator-pod-name> -n openshift-machine-api'
      expr: |
        mapi_mao_collector_up == 0
      for: 5m
      labels:
        severity: critical

3.$ oc get prometheusrule machine-config-daemon -n openshift-machine-config-operator -oyaml|grep -B10 critical
spec:
  groups:
  - name: mcd-reboot-error
    rules:
    - alert: MCDRebootError
      annotations:
        message: Reboot failed on {{ $labels.node }} , update may be blocked
      expr: |
        mcd_reboot_err > 0
      labels:
        severity: critical


Actual results:
"runbook_url" annotation links are missing. 

Expected results:
All critical alerts have a proper "runbook_url" annotation.

Additional info: