Add an Entity Type plural label in @ContentEntityType

@xiaohua-guan

Thank you for providing the patch. I tested it and looks good to me but I was concerned about the following code.

+++ b/modules/cloud_service_providers/k8s/src/Plugin/Derivative/K8sMenuLinks.php
@@ -253,14 +253,7 @@ class K8sMenuLinks extends DeriverBase implements ContainerDeriverInterface {
         continue;
       }
 
-      $label = (string) $entity_definition->getLabel();
-      $title = preg_replace('/Kubernetes (.*)/', '${1}', $label);
-      $title = (preg_match('/y$/', $title))
-        ? preg_replace('/y$/', 'ies', $title)
-        : ((preg_match('/s$|x$|ch$|sh$/', $title))
-          ? $title . 'es'
-          : $title . 's');
-
+      $title = (string) $entity_definition->getCollectionLabel();

I think we should leave the following logic:

-      $title = preg_replace('/Kubernetes (.*)/', '${1}', $label);

@xiaohua-guan

Thank you for the update. I tested it and looks good to me now. I'll merge the patch to 8.x-2.x and close this issue as Fixed.