Add regcred to brusnika-stage kafka exporter

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

@@ -9,6 +9,19 @@ spec:
       namespace: prometheus-stack
   interval: 5m
   timeout: 10m
+  postRenderers:
+    - kustomize:
+        patches:
+          - target:
+              group: apps
+              version: v1
+              kind: Deployment
+              name: kafka-exporter-kafka-exporter-prod
+            patch: |-
+              - op: add
+                path: /spec/template/spec/imagePullSecrets
+                value:
+                  - name: regcred
   values:
     image:
       repository: cr.yandex/crp3ccidau046kdj8g9q/kafka-exporter