Add infeasible support

evaluation_examples/examples/os/b3d4a89c-53f2-4d6b-8b6a-541fb5d205fa.json

@@ -9,7 +9,7 @@
     "os"
   ],
   "evaluator": {
-    "func": "",
+    "func": "infeasible",
     "result": {
     },
     "expected": {

evaluation_examples/examples/os/e2eb4bf1-aa93-4192-b55d-03e2fb6dfd15.json

@@ -8,7 +8,7 @@
       "os"
     ],
     "evaluator": {
-      "func": "",
+      "func": "infeasible",
       "result": {
       },
       "expected": {

evaluation_examples/examples/os/fe41f596-a71b-4c2f-9b2f-9dcd40b568c3.json

@@ -5,32 +5,15 @@
   "source": "https://help.ubuntu.com/lts/ubuntu-help/power-percentage.html.en",
   "trajectory": "trajectories/",
   "config": [
-    {
-      "type": "execute",
-      "parameters": {
-        "command": [
-          "python",
-          "-c",
-          "import pyautogui; import time; pyautogui.click(960, 540); time.sleep(0.5);"
-        ]
-      }
-    }
   ],
   "related_apps": [
     "os"
   ],
   "evaluator": {
-    "func": "exact_match",
+    "func": "infeasible",
     "result": {
-      "type": "vm_command_line",
-      "command": "gsettings get org.gnome.desktop.interface show-battery-percentage",
-      "shell": true
     },
     "expected": {
-      "type": "rule",
-      "rules": {
-        "expected": "true\n"
-      }
     }
   }
 }