Adjust device_tracker tests which create devices (#98188)

tests/components/device_tracker/test_entities.py

@@ -25,9 +25,11 @@ async def test_scanner_entity_device_tracker(
 ) -> None:
     """Test ScannerEntity based device tracker."""
     # Make device tied to other integration so device tracker entities get enabled
+    other_config_entry = MockConfigEntry(domain="not_fake_integration")
+    other_config_entry.add_to_hass(hass)
     dr.async_get(hass).async_get_or_create(
         name="Device from other integration",
-        config_entry_id=MockConfigEntry().entry_id,
+        config_entry_id=other_config_entry.entry_id,
         connections={(dr.CONNECTION_NETWORK_MAC, "ad:de:ef:be:ed:fe")},
     )