[Data] Fix type annotation for actor_location_tracker arg of _MapWorker (#57859)

## Description

The type annotation for `actor_location_tracker` is currently
`ActorLocationTracker`, but it should be
`ray.actor.ActorHandle[ActorLocationTracker]`. This PR fixes that issue.

Signed-off-by: Balaji Veeramani <[email protected]>
Signed-off-by: elliot-barn <[email protected]>

Author: bveeramani

python/ray/data/_internal/execution/operators/actor_pool_map_operator.py

@@ -543,7 +543,7 @@ def __init__(
         src_fn_name: str,
         map_transformer: MapTransformer,
         logical_actor_id: str,
-        actor_location_tracker: ActorLocationTracker,
+        actor_location_tracker: ray.actor.ActorHandle[ActorLocationTracker],
     ):
         self.src_fn_name: str = src_fn_name
         self._map_transformer = map_transformer