Description of problem:
all the alert rules'  annotations "summary" and "description"  should comply with the OpenShift alerting guidelines

Version-Release number of selected component (if applicable):
4.9.0-0.nightly-2021-08-07-175228

How reproducible:
always

Steps to Reproduce:
1.
2.
3.

Actual results:
$ oc get prometheusrules -n openshift-cloud-credential-operator -oyaml
apiVersion: v1
items:
- apiVersion: monitoring.coreos.com/v1
  kind: PrometheusRule
  metadata:
    annotations:
      exclude.release.openshift.io/internal-openshift-hosted: "true"
      include.release.openshift.io/self-managed-high-availability: "true"
    creationTimestamp: "2021-08-10T23:12:03Z"
    generation: 1
    name: cloud-credential-operator-alerts
    namespace: openshift-cloud-credential-operator
    ownerReferences:
    - apiVersion: config.openshift.io/v1
      kind: ClusterVersion
      name: version
      uid: 9fc7b5b6-6c23-4335-be07-ecfe1b9a142f
    resourceVersion: "1785"
    uid: 97b9370d-f34d-4208-aef3-240759b9f53b
  spec:
    groups:
    - name: CloudCredentialOperator
      rules:
      - alert: CloudCredentialOperatorTargetNamespaceMissing
        annotations:
          message: CredentialsRequest(s) pointing to non-existent namespace
        expr: cco_credentials_requests_conditions{condition="MissingTargetNamespace"}
          > 0
        for: 5m
        labels:
          severity: warning
      - alert: CloudCredentialOperatorProvisioningFailed
        annotations:
          message: CredentialsRequest(s) unable to be fulfilled
        expr: cco_credentials_requests_conditions{condition="CredentialsProvisionFailure"}
          > 0
        for: 5m
        labels:
          severity: warning
      - alert: CloudCredentialOperatorDeprovisioningFailed
        annotations:
          message: CredentialsRequest(s) unable to be cleaned up
        expr: cco_credentials_requests_conditions{condition="CredentialsDeprovisionFailure"}
          > 0
        for: 5m
        labels:
          severity: warning
      - alert: CloudCredentialOperatorInsufficientCloudCreds
        annotations:
          message: Cluster's cloud credentials insufficient for minting or passthrough
        expr: cco_credentials_requests_conditions{condition="InsufficientCloudCreds"}
          > 0
        for: 5m
        labels:
          severity: warning
kind: List
metadata:
  resourceVersion: ""

  selfLink: ""


Expected results:
alert rules have annotations "summary" and "description"

Additional info:
the "summary" and "description" annotations comply with the OpenShift alerting guidelines [1]

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