V11: Obsolete action to publish (#14208)

* Add obsolete message to ActionToPublish

* Obsolete handler for ContentSentTOPublishNotifcation

src/Umbraco.Core/Actions/ActionToPublish.cs

@@ -6,6 +6,7 @@ namespace Umbraco.Cms.Core.Actions;
 /// <summary>
 ///     This action is invoked when children to a document is being sent to published (by an editor without publishrights).
 /// </summary>
+[Obsolete("Scheduled for removal in v13")]
 public class ActionToPublish : IAction
 {
     /// <inheritdoc cref="IAction.ActionLetter"/>

src/Umbraco.Core/Events/UserNotificationsHandler.cs

@@ -107,6 +107,7 @@ public sealed class UserNotificationsHandler :
         _notifier.Notify(_actions.GetAction<ActionUpdate>(), updatedEntities.ToArray());
     }
 
+    [Obsolete("Scheduled for removal in v13")]
     public void Handle(ContentSentToPublishNotification notification) =>
         _notifier.Notify(_actions.GetAction<ActionToPublish>(), notification.Entity);