refactor: Changed settings registry's callbacks to work with async functions (#28784)

apps/meteor/app/2fa/server/startup/settings.ts

apps/meteor/app/analytics/server/settings.ts

apps/meteor/app/api/server/settings.ts

apps/meteor/app/apple/server/appleOauthRegisterService.ts

apps/meteor/app/assets/server/assets.ts

apps/meteor/app/authentication/server/startup/settings.ts

apps/meteor/app/autotranslate/server/settings.ts

apps/meteor/app/bot-helpers/server/settings.ts

apps/meteor/app/cas/server/cas_rocketchat.js

apps/meteor/app/crowd/server/settings.ts

apps/meteor/app/custom-sounds/server/startup/settings.ts

apps/meteor/app/discussion/server/config.ts

apps/meteor/app/drupal/server/startup.ts

apps/meteor/app/e2e/server/settings.ts

apps/meteor/app/emoji-custom/server/startup/settings.ts

apps/meteor/app/error-handler/server/startup/settings.ts

apps/meteor/app/federation/server/startup/settings.ts

apps/meteor/app/file-upload/server/startup/settings.ts

apps/meteor/app/github-enterprise/server/startup.ts

apps/meteor/app/gitlab/server/startup.ts