Make test_generate_with_static_cache even less flaky (#34995)

* fix

* fix

* fix

* fix

* fix

* fix

* fix

* fix

* fix

---------

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

tests/generation/test_utils.py

@@ -37,6 +37,9 @@ from transformers.testing_utils import (
     require_torch_multi_accelerator,
     require_torch_multi_gpu,
     require_torch_sdpa,
+    set_config_for_less_flaky_test,
+    set_model_for_less_flaky_test,
+    set_model_tester_for_less_flaky_test,
     slow,
     torch_device,
 )
@@ -1921,11 +1924,13 @@ class GenerationTesterMixin:
         Tests that generating with static cache give almost same results as with dynamic cache, and the output cache
         has the expected shapes
         """
+        set_model_tester_for_less_flaky_test(self)
         for model_class in self.all_generative_model_classes:
             if not model_class._supports_static_cache:
                 self.skipTest(reason="This model does not support the static cache format")
 
             config, inputs_dict = self.prepare_config_and_inputs_for_generate()
+            set_config_for_less_flaky_test(config)
             main_input = inputs_dict[model_class.main_input_name]
 
             if config.is_encoder_decoder:
@@ -1938,6 +1943,8 @@ class GenerationTesterMixin:
 
             for dtype in (torch.float32, torch.float16):
                 model = model_class(config).to(torch_device).to(dtype).eval()
+                set_model_for_less_flaky_test(model)
+
                 generation_kwargs = {
                     "max_new_tokens": max_new_tokens,
                     "return_dict_in_generate": True,  # Required to return `past_key_values`