Generate: increase left-padding test atol (#23448)

increase atol

tests/generation/test_utils.py

@@ -1608,7 +1608,6 @@ class GenerationTesterMixin:
                 attn_weights = out[attn_name] if attn_name == attention_names[0] else out[attn_name][-1]
                 self.assertEqual(sum([w.sum().item() for w in attn_weights]), 0.0)
 
-    @slow  # TODO (Joao): fix GPTBigCode
     def test_left_padding_compatibility(self):
         # The check done in this test is fairly difficult -- depending on the model architecture, passing the right
         # position index for the position embeddings can still result in a different output, due to numerical masking.
@@ -1648,7 +1647,7 @@ class GenerationTesterMixin:
                     position_ids.masked_fill_(padded_attention_mask == 0, 1)
                     model_kwargs["position_ids"] = position_ids
                 next_logits_with_padding = model(**model_kwargs).logits[:, -1, :]
-                if not torch.allclose(next_logits_wo_padding, next_logits_with_padding):
+                if not torch.allclose(next_logits_wo_padding, next_logits_with_padding, atol=1e-7):
                     no_failures = False
                     break