fix accelerate tests for roberta xl (#31288)

* fix accelerate tests for roberta xl

* style

src/transformers/models/xlm_roberta_xl/modeling_xlm_roberta_xl.py

@@ -572,7 +572,7 @@ class XLMRobertaXLPreTrainedModel(PreTrainedModel):
 
     config_class = XLMRobertaXLConfig
     base_model_prefix = "roberta"
-    _no_split_modules = ["XLMRobertaXLEmbeddings", "XLMRobertaXLSelfAttention"]
+    _no_split_modules = ["XLMRobertaXLEmbeddings", "XLMRobertaXLLayer"]
 
     # Copied from transformers.models.bert.modeling_bert.BertPreTrainedModel._init_weights
     def _init_weights(self, module):

tests/models/xlm_roberta_xl/test_modeling_xlm_roberta_xl.py

@@ -387,6 +387,8 @@ class XLMRobertaXLModelTest(ModelTesterMixin, GenerationTesterMixin, PipelineTes
         else {}
     )
 
+    model_split_percents = [0.5, 0.85, 0.95]
+
     # TODO: Fix the failed tests
     def is_pipeline_test_to_skip(
         self, pipeline_test_casse_name, config_class, model_architecture, tokenizer_name, processor_name