test(jobs): skip test_hf if datasets extra is missing

lerobot.configs.train pulls in datasets at import time, so the module
fails to collect without lerobot[dataset]. Guard with importorskip,
matching the convention in tests/training/test_multi_gpu.py.

tests/jobs/test_hf.py

@@ -21,6 +21,8 @@ import draccus
 import httpx
 import pytest
 
+pytest.importorskip("datasets", reason="datasets is required (install lerobot[dataset])")
+
 from lerobot.configs.train import TrainPipelineConfig
 from lerobot.jobs.hf import (
     _pod_forwarded_args,