feat: enable FSDP in LTX2 smoke test to avoid OOM in CI

Author: Perseus14

src/maxdiffusion/tests/ltx2_smoke_test.py

@@ -48,6 +48,10 @@ def setUpClass(cls):
             "num_frames=9",  # Small number of frames
             "seed=0",
             "attention=flash",
+            "ici_fsdp_parallelism=8",
+            "ici_data_parallelism=1",
+            "ici_context_parallelism=1",
+            "ici_tensor_parallelism=1",
         ],
         unittest=True,
     )