NETOBSERV-2502: add missing labels (#1150)

Author: jotak

contrib/docker/Dockerfile.downstream

@@ -29,6 +29,10 @@ USER 65532:65532
 
 ENTRYPOINT ["/flowlogs-pipeline"]
 
+LABEL distribution-scope="public"
+LABEL url="https://catalog.redhat.com/en/search?searchType=containers"
+LABEL vendor="Red Hat, Inc."
+LABEL release=$BUILDVERSION
 LABEL com.redhat.component="network-observability-flowlogs-pipeline-container"
 LABEL name="network-observability/network-observability-flowlogs-pipeline-rhel9"
 LABEL cpe="cpe:/a:redhat:network_observ_optr:$BUILDVERSION_Y::el9"