refactor: LivechatPriority out of DB Watcher (#32362)

apps/meteor/app/lib/server/lib/notifyListener.ts

...eteor/ee/app/livechat-enterprise/server/api/priorities.ts

apps/meteor/ee/server/models/raw/LivechatPriority.ts

apps/meteor/server/database/watchCollections.ts

apps/meteor/server/modules/watchers/watchers.module.ts

packages/core-services/src/events/Events.ts

packages/model-typings/src/models/ILivechatPriorityModel.ts