[nancy] Kwollect - Add metrics for all nancy clusters and network

data/grid5000/sites/nancy/clusters/graffiti/graffiti.json

data/grid5000/sites/nancy/clusters/graoully/graoully.json

data/grid5000/sites/nancy/clusters/graphique/graphique.json

data/grid5000/sites/nancy/clusters/graphite/graphite.json

data/grid5000/sites/nancy/clusters/grcinq/grcinq.json

data/grid5000/sites/nancy/clusters/grele/grele.json

data/grid5000/sites/nancy/clusters/grimani/grimani.json

data/grid5000/sites/nancy/clusters/grimoire/grimoire.json

data/grid5000/sites/nancy/clusters/grisou/grisou.json

data/grid5000/sites/nancy/clusters/gros/gros.json

data/grid5000/sites/nancy/clusters/grue/grue.json

data/grid5000/sites/nancy/clusters/grvingt/grvingt.json

data/grid5000/sites/nancy/network_equipments/gw.json

.../grid5000/sites/nancy/network_equipments/sgraoullyib.json

data/grid5000/sites/nancy/network_equipments/sgrcinq.json

data/grid5000/sites/nancy/network_equipments/sgrisou1.json

data/grid5000/sites/nancy/network_equipments/sgrvingt.json

...d5000/sites/nancy/clusters/graffiti/graffiti_metrics.yaml

...d5000/sites/nancy/clusters/graoully/graoully_metrics.yaml

...000/sites/nancy/clusters/graphique/graphique_metrics.yaml