[cern] Add Monitoring alert to CERN central infra
Added labels: METRICS_ALERT_MATTERMOST_HOOK METRICS_ALERT_DESTINATION_URL METRICS_ALERT_ENDPOINT_TYPE
Change-Id: Ie141c178af9da937cc1ddaa349f82afe9a42c6af Signed-off-by: Diogo Guerra diogo.filipe.tomas.guerra@cern.ch