Enhancement: Update ODS to v12.0.0-alpha1

We updated the ownCloud Design System to version 12.0.0-alpha1. Please refer to the full changelog in the ODS release (linked) for more details. Summary:

- Change - Remove oc-table-files from ods: https://github.com/owncloud/owncloud-design-system/pull/1817
- Change - Remove unused props for unstyled components: https://github.com/owncloud/owncloud-design-system/pull/1795

https://github.com/owncloud/web/pull/6106
https://github.com/owncloud/owncloud-design-system/releases/tag/v12.0.0-alpha1
