Manage the on-call paging targets (services, teams, or schedules) attached to a specific vendor paging integration instance. Options include PagerDuty, Opsgenie, Jira Service Management, xMatters, Everbridge, Grafana OnCall, or MIR3.Targets are what an incident pages. Each is identified by the vendor-side id used when paging. These endpoints are nested under the owning integration instance.