[grostiti] fix cluster microarchitecture

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

@@ -466,8 +466,8 @@
     "turboboost_enabled": true
   },
   "performance": {
-    "core_flops": 8800000000,
-    "node_flops": 492800000000
+    "core_flops": 35200000000,
+    "node_flops": 1971200000000
   },
   "processor": {
     "cache_l1": null,
@@ -478,7 +478,7 @@
     "clock_speed": 2200000000,
     "ht_capable": true,
     "instruction_set": "x86-64",
-    "microarchitecture": "Nehalem",
+    "microarchitecture": "Haswell",
     "microcode": "0x1a",
     "model": "Intel Xeon",
     "other_description": "Intel(R) Xeon(R) CPU E7-4850 v3 @ 2.20GHz",

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

@@ -13,7 +13,7 @@ nodes:
       besteffort: true
       max_walltime: 0
     processor:
-      microarchitecture: Nehalem
+      microarchitecture: Haswell
       clock_speed: 2200000000
     software:
       standard-environment: debian11-x64-std