Ensures entity has published key before setting status

Checks if the entity type has a 'published' key before attempting to set the published status.

This prevents potential errors when dealing with entities that do not support or define a published status field.

Closes #3516599

sources/content/src/Plugin/tmgmt/Source/ContentEntitySource.php

@@ -615,7 +615,7 @@ class ContentEntitySource extends SourcePluginBase implements SourcePreviewInter
       }
     }
     // Otherwise, try to set a published status.
-    elseif (isset($data['#published'][0]) && $translation instanceof EntityPublishedInterface) {
+    elseif (isset($data['#published'][0]) && $translation instanceof EntityPublishedInterface && $translation->getEntityType()->hasKey('published')) {
       if ($data['#published'][0]) {
         $translation->setPublished();
       }