[users-vm/nix-datamove] Add nix-datamove vm information

data/grid5000/sites/grenoble/servers/nix-datamove.json

+{
+  "expire": "2024-02",
+  "kind": "virtual",
+  "network_adapters": {
+    "default": {
+      "ip": "172.16.32.2"
+    }
+  },
+  "type": "server",
+  "uid": "nix-datamove"
+}
\ No newline at end of file

input/grid5000/sites/grenoble/servers/users-vm.yaml

+nix-datamove:
+  kind: virtual
+  expire: 2024-02
+  network_adapters: {default: {ip: 172.16.32.2}}