Corrige handler do campo field_user_department para default:group

Substitui handler: views (referenciando view inexistente 'departments')
por handler: default:group com target_bundles, eliminando o erro
'Attempt to create a field without a field_name' na instalação.

modules/ldap_departments_sync/config/optional/field.field.user.user.field_user_department.yml

@@ -16,9 +16,12 @@ translatable: true
 default_value: {  }
 default_value_callback: ''
 settings:
-  handler: views
+  handler: default:group
   handler_settings:
-    view:
-      view_name: departments
-      display_name: entity_reference_1
+    target_bundles:
+      departments: departments
+    sort:
+      field: _none
+    auto_create: false
+    auto_create_bundle: ''
 field_type: entity_reference