Fixes #15745 playbook include: Conditional scoping

Fixes #15745
Applies conditional forwarding to all tasks/roles within the included playbook.
The existing line only applies forwarded conditionals to the main Task block, and misses pre_, post_, and roles.

Typo ::

Made a selection mistake when I copied over the one line change

lib/ansible/playbook/playbook_include.py

@@ -96,7 +96,7 @@ class PlaybookInclude(Base, Conditional, Taggable):
             # plays. If so, we can take a shortcut here and simply prepend them to
             # those attached to each block (if any)
             if forward_conditional:
-                for task_block in entry.tasks:
+                for task_block in entry.pre_tasks + entry.roles + entry.tasks + entry.post_tasks:
                     task_block.when = self.when[:] + task_block.when
 
         return pb