Convert to new unit APIs, remove old APIs.

There are probably plenty of raw ints around that never used the old
conversion APIs, but we'll just need to fix those when we see them.

Fixes https://github.com/Khopa/dcs_liberation/issues/558

game/procurement.py

@@ -6,11 +6,12 @@ import random
 from typing import Iterator, List, Optional, TYPE_CHECKING, Type
 
 from dcs.task import CAP, CAS
-from dcs.unittype import FlyingType, UnitType, VehicleType
+from dcs.unittype import FlyingType, VehicleType
 
 from game import db
 from game.factions.faction import Faction
 from game.theater import ControlPoint, MissionTarget
+from game.utils import Distance
 from gen.flights.ai_flight_planner_db import (
     capable_aircraft_for_task,
     preferred_aircraft_for_task,
@@ -25,7 +26,7 @@ if TYPE_CHECKING:
 @dataclass(frozen=True)
 class AircraftProcurementRequest:
     near: MissionTarget
-    range: int
+    range: Distance
     task_capability: FlightType
     number: int