Re-enabling all fast pipeline tests. (#15924)

tests/pipelines/test_pipelines_common.py

@@ -64,7 +64,8 @@ def get_tiny_config_from_class(configuration_class):
     camel_case_model_name = configuration_class.__name__.split("Config")[0]
 
     try:
-        module = importlib.import_module(f".test_modeling_{model_type.replace('-', '_')}", package="tests")
+        model_slug = model_type.replace("-", "_")
+        module = importlib.import_module(f".test_modeling_{model_slug}", package=f"tests.{model_slug}")
         model_tester_class = getattr(module, f"{camel_case_model_name}ModelTester", None)
     except (ImportError, AttributeError):
         logger.error(f"No model tester class for {configuration_class.__name__}")