[servan/ht] Turn on HT on servan

data/grid5000/sites/grenoble/clusters/servan/nodes/servan-1.json

 {
   "architecture": {
-    "cpu_core_numbering": "contiguous-including-threads",
+    "cpu_core_numbering": "contiguous",
     "nb_cores": 48,
     "nb_procs": 2,
-    "nb_threads": 48,
+    "nb_threads": 96,
     "platform_type": "x86_64"
   },
   "bios": {
@@ -322,7 +322,7 @@
   "operating_system": {
     "cstate_driver": "acpi_idle",
     "cstate_governor": "menu",
-    "ht_enabled": false,
+    "ht_enabled": true,
     "pstate_driver": "acpi-cpufreq",
     "pstate_governor": "performance",
     "turboboost_enabled": true