[nancy][gres] Add gres to production queue

data/grid5000/accesses/nodesets.json

data/grid5000/accesses/refrepo.json

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

data/grid5000/sites/nancy/clusters/gres/nodes/gres-1.json

data/grid5000/sites/nancy/clusters/gres/nodes/gres-2.json

data/grid5000/sites/nancy/clusters/gres/nodes/gres-3.json

data/grid5000/sites/nancy/clusters/gres/nodes/gres-4.json

data/grid5000/sites/nancy/clusters/gres/nodes/gres-5.json

data/grid5000/sites/nancy/clusters/gres/nodes/gres-6.json

data/grid5000/sites/nancy/clusters/gres/nodes/gres-7.json

input/grid5000/access/nancy.yaml

input/grid5000/sites/nancy/clusters/gres/gres.yaml