NETOBSERV-2502: add missing labels (#1138)

Author: jotak

Dockerfile.downstream

@@ -46,6 +46,10 @@ USER 65532:65532
 
 ENTRYPOINT ["./plugin-backend"]
 
+LABEL distribution-scope="public"
+LABEL url="https://catalog.redhat.com/en/search?searchType=containers"
+LABEL vendor="Red Hat, Inc."
+LABEL release=$BUILDVERSION
 LABEL com.redhat.component="network-observability-console-plugin-container"
 LABEL name="network-observability/network-observability-console-plugin-compat-rhel9"
 LABEL cpe="cpe:/a:redhat:network_observ_optr:$BUILDVERSION_Y::el9"