Adapt scheduler tests to time-machine 3 on v1.x.x

Signed-off-by: Mathias L. Baumann <mathias.baumann@frequenz.com>

Author: Marenz

tests/test_dispatcher_scheduler.py

@@ -39,7 +39,7 @@ def event_loop_policy() -> async_solipsism.EventLoopPolicy:
 
 
 @fixture
-def fake_time() -> Iterator[time_machine.Coordinates]:
+def fake_time() -> Iterator[time_machine.Traveller]:
     """Replace real time with a time machine that doesn't automatically tick."""
     with time_machine.travel(destination=0, tick=False) as traveller:
         yield traveller
@@ -90,7 +90,7 @@ def lifecycle_receiver(scheduler: DispatchScheduler) -> Receiver[DispatchEvent]:
 
 
 async def test_parallel_dispatches_same_window_and_follow_up_window(
-    fake_time: time_machine.Coordinates,
+    fake_time: time_machine.Traveller,
     generator: DispatchGenerator,
     microgrid_id: MicrogridId,
     client: FakeClient,
@@ -179,7 +179,7 @@ async def test_parallel_dispatches_same_window_and_follow_up_window(
 
 
 async def test_parallel_dispatches_with_payload_updates_before_start(
-    fake_time: time_machine.Coordinates,
+    fake_time: time_machine.Traveller,
     generator: DispatchGenerator,
     microgrid_id: MicrogridId,
     client: FakeClient,
@@ -249,7 +249,7 @@ async def test_parallel_dispatches_with_payload_updates_before_start(
 
 
 async def test_dispatch_payload_update_at_stop_boundary(
-    fake_time: time_machine.Coordinates,
+    fake_time: time_machine.Traveller,
     generator: DispatchGenerator,
     microgrid_id: MicrogridId,
     client: FakeClient,