Make Cache\Updater per storage

apps/dav/lib/connector/sabre/file.php

apps/encryption/lib/migration.php

apps/files_trashbin/lib/trashbin.php

lib/private/files/cache/updater.php

lib/private/files/storage/common.php

lib/private/files/storage/storage.php

lib/private/files/storage/wrapper/wrapper.php

lib/private/files/view.php

tests/lib/files/cache/updater.php