Move is_pipeline_test_to_skip to specific model test classes (#21999)

* Move `is_pipeline_test_to_skip` to specific model test classes

---------

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

tests/models/openai/test_modeling_openai.py

@@ -210,6 +210,18 @@ class OpenAIGPTModelTest(ModelTesterMixin, GenerationTesterMixin, PipelineTester
         else {}
     )
 
+    # TODO: Fix the failed tests
+    def is_pipeline_test_to_skip(
+        self, pipeline_test_casse_name, config_class, model_architecture, tokenizer_name, processor_name
+    ):
+        if pipeline_test_casse_name == "ZeroShotClassificationPipelineTests":
+            # Get `tokenizer does not have a padding token` error for both fast/slow tokenizers.
+            # `OpenAIGPTConfig` was never used in pipeline tests, either because of a missing checkpoint or because a
+            # tiny config could not be created.
+            return True
+
+        return False
+
     # special case for DoubleHeads model
     def _prepare_for_class(self, inputs_dict, model_class, return_labels=False):
         inputs_dict = super()._prepare_for_class(inputs_dict, model_class, return_labels=return_labels)