refactor: Move fileupload implementation to async (#28769)

apps/meteor/app/apps/server/bridges/uploads.ts

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

apps/meteor/app/federation/server/endpoints/dispatch.js

apps/meteor/app/file-upload/lib/FileUploadBase.ts

apps/meteor/app/file-upload/server/config/FileSystem.ts

apps/meteor/app/file-upload/server/config/GridFS.ts

apps/meteor/app/file-upload/server/config/Webdav.ts

apps/meteor/app/file-upload/server/lib/FileUpload.ts

apps/meteor/app/file-upload/server/lib/proxy.ts

apps/meteor/app/file-upload/server/lib/requests.ts

.../meteor/app/file-upload/server/methods/sendFileMessage.ts

apps/meteor/app/file-upload/ufs/AmazonS3/server.ts

apps/meteor/app/file-upload/ufs/GoogleStorage/server.ts

apps/meteor/app/file-upload/ufs/Webdav/server.ts

apps/meteor/app/file/server/file.server.js

apps/meteor/app/importer-pending-files/server/importer.js

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

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

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

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