[Feature] Coordinate FullCG prefill across DP-attention ranks (#35640)

Co-authored-by: Yuwei An <ayw.sirius19@gmail.com>

test/registered/unit/model_executor/test_mlp_sync_pad_unpad.py

@@ -59,7 +59,7 @@ class TestMlpSyncPadUnpad(CustomTestCase):
         batch = SimpleNamespace(
             global_num_tokens=[2, 0, 3],
             global_num_tokens_for_logprob=[2, 0, 3],
-            can_run_dp_cuda_graph=True,
+            can_run_decode_cuda_graph=True,
         )
 
         fb.init_mlp_sync_metadata(batch, torch.device("cpu"))
@@ -71,7 +71,7 @@ class TestMlpSyncPadUnpad(CustomTestCase):
         torch.testing.assert_close(
             fb.global_num_tokens_for_logprob_gpu, torch.tensor([4, 0, 6])
         )
-        self.assertTrue(fb.can_run_dp_cuda_graph)
+        self.assertTrue(fb.can_run_decode_cuda_graph)
 
     def test_draft_input_without_hidden_states_can_be_padded(self):
         spec_info = SimpleNamespace(