Add platform/installation name as external label to Prometheus/Thanos Ruler
Summary
Currently here is no way to identify which platform an alert is refering to
Details
An additional external_label
(e.g. platform_tag) must be added to each Prometheus server so it attaches it to every alert it sends to Alertmanager
The same must be added for the Thanos Ruler component in the management cluster
Alertmanager will keep this label in the sent notifications and similar alerts on different platforms can be differentiated by the receiver.
The external label will also differentiate between platforms in a remote write scenario