[lyon] Add metrics info for clusters

data/grid5000/sites/lyon/clusters/gemini/gemini.json

data/grid5000/sites/lyon/clusters/hercule/hercule.json

data/grid5000/sites/lyon/clusters/nova/nova.json

data/grid5000/sites/lyon/clusters/orion/orion.json

data/grid5000/sites/lyon/clusters/sagittaire/sagittaire.json

data/grid5000/sites/lyon/clusters/taurus/taurus.json

...t/grid5000/sites/lyon/clusters/gemini/gemini_metrics.yaml

...grid5000/sites/lyon/clusters/hercule/hercule_metrics.yaml

input/grid5000/sites/lyon/clusters/nova/nova_metrics.yaml

input/grid5000/sites/lyon/clusters/orion/orion_metrics.yaml

...00/sites/lyon/clusters/sagittaire/sagittaire_metrics.yaml

...t/grid5000/sites/lyon/clusters/taurus/taurus_metrics.yaml