refactor: Moves `getUserDisplayName` outside from meteor app (#35031)

apps/meteor/app/lib/server/functions/attachMessage.ts

.../meteor/app/lib/server/startup/mentionUserNotInChannel.ts

...avBarV2/NavBarSettingsToolbar/UserMenu/UserMenuHeader.tsx

apps/meteor/client/components/UserInfo/UserInfo.tsx

apps/meteor/client/components/message/MessageHeader.tsx

...teor/client/components/message/variants/SystemMessage.tsx

apps/meteor/client/hooks/useRoomName.ts

apps/meteor/client/lib/getUserDisplayName.spec.ts

apps/meteor/client/sidebar/header/UserMenuHeader.tsx

.../client/views/admin/moderation/helpers/ContextMessage.tsx

apps/meteor/client/views/conference/ConferencePage.tsx

...nnel/contactHistory/MessageList/ContactHistoryMessage.tsx

.../client/views/outlookCalendar/hooks/useOutlookOpenCall.ts

apps/meteor/client/views/room/UserCard/UserCardWithData.tsx

...views/room/body/RoomForeword/RoomForewordUsernameList.tsx

...s/room/body/RoomForeword/RoomForewordUsernameListItem.tsx

...ient/views/room/composer/messageBox/MessageBoxReplies.tsx

...client/views/room/composer/messageBox/MessageBoxReply.tsx

...alBar/VideoConference/VideoConfList/VideoConfListItem.tsx

...ntextualBar/VideoConference/hooks/useVideoConfRoomName.ts