Story: As an OpenShift admin I want the Quay Operator to set up reasonable default alerting rules for Quay/Clair deployments so that I get notifications when certain metrics indicate an unhealthy or underperforming Quay registry.

Acceptance criteria:

• resonable default alert rules on hardware resource utilization (CPU, Memory, DiskSpace) for Quay components and dependencies
• default alert rules for Quay overall healthiness (as defined in the Quay health endpoint)
• alerts that make the Quay admin understand that the build workers fight a huge backlog
• alerts that make the Quay admin understand that the mirroring workers fight a huge backlog
• alerts that make the Quay admin understand that clair fight a huge scanning backlog
• alerts on exceeding average / n-th percentile pull / push times
• alerts on exceeding API latencies
• alerts on low available storage space of any of the Quay dependencies (database, K/V store, NooBaa backend)