Remove virtual rooms (#29635)

* Remove virtual rooms from the timelinePanel and RoomView

* Remove VoipUserMapper

* Remove some unneeded imports

* Remove tovirtual slash command test

* Remove getSupportsVirtualRooms and virtualLookup

* lint

* Remove PROTOCOL_SIP_NATIVE

* Remove native/virtual looks fields and fix tests

* Remove unused lookup fields

src/@types/global.d.ts

@@ -29,7 +29,6 @@ import type LegacyCallHandler from "../LegacyCallHandler";
 import type UserActivity from "../UserActivity";
 import { type ModalWidgetStore } from "../stores/ModalWidgetStore";
 import { type WidgetLayoutStore } from "../stores/widgets/WidgetLayoutStore";
-import type VoipUserMapper from "../VoipUserMapper";
 import { type SpaceStoreClass } from "../stores/spaces/SpaceStore";
 import type TypingStore from "../stores/TypingStore";
 import { type EventIndexPeg } from "../indexing/EventIndexPeg";
@@ -113,7 +112,6 @@ declare global {
         mxLegacyCallHandler: LegacyCallHandler;
         mxUserActivity: UserActivity;
         mxModalWidgetStore: ModalWidgetStore;
-        mxVoipUserMapper: VoipUserMapper;
         mxSpaceStore: SpaceStoreClass;
         mxVoiceRecordingStore: VoiceRecordingStore;
         mxTypingStore: TypingStore;