Wrap RemBert integration test forward passes with torch.no_grad() (#21503)

added with torch.no_grad() to the integration tests and applied make style
Co-authored-by: Bibi <Bibi@katies-mac.local>

tests/models/rembert/test_modeling_rembert.py

@@ -464,6 +464,7 @@ class RemBertModelIntegrationTest(unittest.TestCase):
         model = RemBertModel.from_pretrained("google/rembert")
         input_ids = torch.tensor([[312, 56498, 313, 2125, 313]])
         segment_ids = torch.tensor([[0, 0, 0, 1, 1]])
+        with torch.no_grad():
             output = model(input_ids, token_type_ids=segment_ids, output_hidden_states=True)
 
         hidden_size = 1152