NETOBSERV-2502: add missing labels (#428)

Author: jotak

Dockerfile.downstream

@@ -54,6 +54,10 @@ USER 65532:65532
 
 ENTRYPOINT ["/network-observability-cli"]
 
+LABEL distribution-scope="public"
+LABEL url="https://catalog.redhat.com/en/search?searchType=containers"
+LABEL vendor="Red Hat, Inc."
+LABEL release=$BUILDVERSION
 LABEL com.redhat.component="network-observability-cli"
 LABEL name="network-observability/network-observability-cli-rhel9"
 LABEL cpe="cpe:/a:redhat:network_observ_optr:$BUILDVERSION_Y::el9"