Fix failed tests due to the side effect of lazy init on model handlers.

Author: shunping

sdks/python/apache_beam/ml/anomaly/detectors/pyod_adapter.py

@@ -36,9 +36,15 @@
 from apache_beam.ml.inference.utils import _convert_to_result
 from pyod.models.base import BaseDetector as PyODBaseDetector
 
-# Turn the used ModelHandler into specifiable
-KeyedModelHandler = specifiable(KeyedModelHandler)  # type: ignore[misc]
-_PostProcessingModelHandler = specifiable(_PostProcessingModelHandler)  # type: ignore[misc]
+# Turn the used ModelHandler into specifiable, but without lazy init.
+KeyedModelHandler = specifiable(  # type: ignore[misc]
+    KeyedModelHandler,
+    on_demand_init=False,
+    just_in_time_init=False)
+_PostProcessingModelHandler = specifiable(  # type: ignore[misc]
+    _PostProcessingModelHandler,
+    on_demand_init=False,
+    just_in_time_init=False)
 
 
 @specifiable