Fix brusnika-stage alert labels

clusters/brusnika-stage/infrastructure/kafka-exporter-yc.yaml

@@ -143,6 +143,21 @@ spec:
               - op: add
                 path: /spec/selector/matchLabels/app.kubernetes.io~1instance
                 value: kafka-exporter-yc
+              - op: add
+                path: /spec/endpoints/0/relabelings
+                value:
+                  - action: replace
+                    targetLabel: kafka_instance
+                    replacement: yc-kafka
+                  - action: replace
+                    targetLabel: source_cluster
+                    replacement: yc-kafka
+                  - action: replace
+                    targetLabel: monitored_cluster
+                    replacement: yc-kafka
+                  - action: replace
+                    targetLabel: cluster
+                    replacement: brusnika-stage
   values:
     fullnameOverride: kafka-exporter-yc
     image:

clusters/brusnika-stage/infrastructure/patches/vmstack.yaml

@@ -39,6 +39,8 @@ spec:
       enabled: true
       spec:
         evaluationInterval: 30s
+        externalLabels:
+          cluster: brusnika-stage
         extraArgs:
           external.url: https://vmalert.test.sarex.brusnika.tech
       ingress: