Merge pull request JetBrains#2417 from krzema12/KT-47068-backfill-KUG-positions

KT-47068: Backfill user groups positions and make position mandatory

Author: nikpachoo

data/schemas/user-groups.json

@@ -49,7 +49,8 @@
           "required": [
             "name",
             "country",
-            "url"
+            "url",
+            "position"
           ]
         }
       }