Ensure the alert receiver is configured

Description

In OpenShift Container Platform, an alert is fired when the conditions defined in an alerting rule are true. An alert provides a notification that a set of circumstances are apparent within a cluster. Firing alerts can be viewed in the Alerting UI in the OpenShift Container Platform web console by default. After an installation, you can configure OpenShift Container Platform to send alert notifications to external systems so that designate personnel can be alerted in real time. OpenShift provides multiple alert receivers integrations to send realtime alerts to different services such as email, slack, pagerduty, webhooks, etc. [1][2] [1]https://docs.openshift.com/container-platform/latest/post_installation_configuration/configuring-alert-notifications.html#configuring-alert-receivers_configuring-alert-notifications [2]https://docs.openshift.com/container-platform/latest/monitoring/managing-alerts.html#applying-custom-alertmanager-configuration_managing-alerts

Rationale

Alerts are a critical part of the OpenShift Container Platform. Proper configuration of receiver is required so that alerts can be sent to external systems in real-time to notify users of potential issues.