Annotate dataset_action_tuples return type

Match the newly typed local; the property returns a flat list of
(action, role_id) tuples.

Author: mvdbeek

lib/galaxy/model/dataset_collections/adapters.py

@@ -229,7 +229,7 @@ def element_object(self) -> Self:
         return self
 
     @property
-    def dataset_action_tuples(self):
+    def dataset_action_tuples(self) -> list[tuple[str | None, int | None]]:
         tuples: list[tuple[str | None, int | None]] = []
         for hda in self.dataset_instances:
             tuples.extend((permission.action, permission.role_id) for permission in hda.dataset.actions)