refactor: 移动 getLevelRewardType 函数至 CardSet 模块

将获取等级奖励类型的函数从 GameSet 模块移至更相关的 CardSet 模块，以提高代码的组织性和模块内聚性。

assets/script/game/map/MissionComp.ts

@@ -9,8 +9,9 @@ import { GameEvent } from "../common/config/GameEvent";
 import { HeroViewComp } from "../hero/HeroViewComp";
 import { UIID } from "../common/config/GameUIConfig";
 import { SkillView } from "../skill/SkillView";
-import { FightSet, getLevelRewardType, CardType, FacSet } from "../common/config/GameSet";
+import { FightSet, CardType, FacSet } from "../common/config/GameSet";
 import { mLogger } from "../common/Logger";
+import { getLevelRewardType } from "../common/config/CardSet";
 const { ccclass, property } = _decorator;