Ensure we don't overwrite handlers from include_role when loading a play. Fixes #18140 (#39563)

lib/ansible/playbook/play.py

@@ -171,7 +171,11 @@ class Play(Base, Taggable, Become):
         Bare handlers outside of a block are given an implicit block.
         '''
         try:
-            return load_list_of_blocks(ds=ds, play=self, use_handlers=True, variable_manager=self._variable_manager, loader=self._loader)
+            return self._extend_value(
+                self.handlers,
+                load_list_of_blocks(ds=ds, play=self, use_handlers=True, variable_manager=self._variable_manager, loader=self._loader),
+                prepend=True
+            )
         except AssertionError as e:
             raise AnsibleParserError("A malformed block was encountered while loading handlers", obj=self._ds, orig_exc=e)