mark `test_save_load_fast_init_from_base` as `is_flaky` (#20200)

Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

tests/test_modeling_common.py

@@ -49,6 +49,7 @@ from transformers.testing_utils import (
     USER,
     CaptureLogger,
     TestCasePlus,
+    is_flaky,
     is_pt_flax_cross_test,
     is_pt_tf_cross_test,
     is_staging_test,
@@ -340,6 +341,7 @@ class ModelTesterMixin:
         if hasattr(module, "bias") and module.bias is not None:
             module.bias.data.fill_(3)
 
+    @is_flaky()
     def test_save_load_fast_init_from_base(self):
         config, inputs_dict = self.model_tester.prepare_config_and_inputs_for_common()
         base_class = MODEL_MAPPING[config.__class__]