[nancy] change ntp site from srv2 to pve-1

data/grid5000/sites/nancy/servers/pve-1.json

 {
+  "alias": [
+    "ntp"
+  ],
   "kind": "physical",
   "network_adapters": {
     "adm": {

data/grid5000/sites/nancy/servers/srv2.json

 {
   "alias": [
-    "ntp"
+
   ],
   "kind": "physical",
   "network_adapters": {

input/grid5000/sites/nancy/servers/physical.yaml

@@ -26,7 +26,7 @@ srv-data2:
 
 srv2:
   kind: physical
-  alias: [ntp]
+  alias: []
   warranty: 2022-10
   serial: 37H1J82
   network_adapters:
@@ -153,6 +153,7 @@ srv3:
 
 pve-1:
   kind: physical
+  alias: [ntp]
   serial: CZJ24220C6
   network_adapters:
     default: