Deuplicat Taxonomy Revision Tab

It's working. Now Drupal 10 and later displays its own tab. No need to define another one with this module.
The same thing happens with the Media Revision Tab. modules/media_diff_ui/media_diff_ui.routing.yml needs to be deleted, too.

I updated the MR with removing every tab the module is defining. On Drupal 10 or later these create duplicate tabs since core already adds those, so I deleted those files.