Move RDF-related tests to RDF module

This issue seems to have removed a lot of important testing from Drupal Core: NodeDisplayConfigurableTest, node_display_configurable_test.info

This testing (that I spent quite a while writing) is/was an important part of the initiative ✨ [META] Expose Title and other base fields in Manage Display Active . I have raised 📌 Reinstate important testing NodeDisplayConfigurableTest Active . I hope that the authors of this issue might be willing to undo this accidental loss from their actions.

quietone → closed merge request !2462