Add policy/act_aloha_real.yaml + env/act_real.yaml (#429)

Co-authored-by: Simon Alibert <75076266+aliberts@users.noreply.github.com>

tests/test_datasets.py

@@ -308,12 +308,11 @@ def test_flatten_unflatten_dict():
         # "lerobot/cmu_stretch",
     ],
 )
+# TODO(rcadene, aliberts): all these tests fail locally on Mac M1, but not on Linux
 def test_backward_compatibility(repo_id):
     """The artifacts for this test have been generated by `tests/scripts/save_dataset_to_safetensors.py`."""
 
-    dataset = LeRobotDataset(
-        repo_id,
-    )
+    dataset = LeRobotDataset(repo_id)
 
     test_dir = Path("tests/data/save_dataset_to_safetensors") / repo_id