Standardize feature flag for internal testing

ts/RemoteConfig.ts

@@ -11,6 +11,7 @@ export type ConfigKeyType =
   | 'desktop.disableGV1'
   | 'desktop.groupCalling'
   | 'desktop.gv2'
+  | 'desktop.internalUser'
   | 'desktop.mandatoryProfileSharing'
   | 'desktop.mediaQuality.levels'
   | 'desktop.messageRequests'
@@ -22,7 +23,6 @@ export type ConfigKeyType =
   | 'desktop.sendSenderKey2'
   | 'desktop.storage'
   | 'desktop.storageWrite3'
-  | 'desktop.worksAtSignal'
   | 'global.groupsv2.groupSizeHardLimit'
   | 'global.groupsv2.maxGroupSize';
 type ConfigValueType = {

ts/util/isAnnouncementGroupReady.ts

@@ -5,7 +5,7 @@ import * as RemoteConfig from '../RemoteConfig';
 
 export function isAnnouncementGroupReady(): boolean {
   return Boolean(
-    RemoteConfig.isEnabled('desktop.worksAtSignal') ||
+    RemoteConfig.isEnabled('desktop.internalUser') ||
       RemoteConfig.isEnabled('desktop.announcementGroup')
   );
 }

ts/util/isScreenSharingEnabled.ts

@@ -10,7 +10,7 @@ export function isScreenSharingEnabled(): boolean {
   const version = window.getVersion?.();
 
   return Boolean(
-    RemoteConfig.isEnabled('desktop.worksAtSignal') ||
+    RemoteConfig.isEnabled('desktop.internalUser') ||
       RemoteConfig.isEnabled('desktop.screensharing2') ||
       (version && isBeta(version))
   );