fix: show locations count instead of servers on tariff cards

servers_count already represents squad count on backend.
Renamed display labels to "locations" on tariff cards and
confirmation view. Server names still shown in subscription card.

src/locales/ru.json

@@ -257,6 +257,10 @@
     "servers_one": "{{count}} сервер",
     "servers_few": "{{count}} сервера",
     "servers_many": "{{count}} серверов",
+    "locationsLabel": "Локации",
+    "locations_one": "{{count}} локация",
+    "locations_few": "{{count}} локации",
+    "locations_many": "{{count}} локаций",
     "traffic": "Трафик",
     "unlimited": "Безлимит",
     "used": "Использовано",