Change: Do not sort in OcTable

We removed sorting from OcTable and added a `sort` event instead, which can be used to sort the data externally.
This is crucial for server side sorting and handling pagination correctly.

https://github.com/owncloud/owncloud-design-system/pull/1825
https://github.com/owncloud/owncloud-design-system/pull/1839
https://github.com/owncloud/web/pull/6136
https://github.com/owncloud/web/issues/5687
