[diffusion][feature] Add component-selective offload policies (#5929)

Signed-off-by: lishunyang12 <lishunyang12@163.com>

tests/diffusion/diffusion_backend/test_diffusers_backend.py

@@ -224,6 +224,7 @@ class TestPipelineArgumentsHandling:
     @pytest.mark.parametrize(
         "feature_id",
         [
+            "compact_offload",
             "cfg_parallel",
             "tensor_parallel",
             "ulysses",
@@ -235,7 +236,11 @@ class TestPipelineArgumentsHandling:
         ],
     )
     def test_adapter_guard_unsupported_feature(self, feature_id):
-        if feature_id == "cfg_parallel":
+        if feature_id == "compact_offload":
+            od_config = _make_od_config(
+                diffusion_offload_config={"mode": "module", "components": ["dit"]},
+            )
+        elif feature_id == "cfg_parallel":
             od_config = _make_od_config(
                 parallel_config=DiffusionParallelConfig(cfg_parallel_size=2, sequence_parallel_size=1),
                 cache_backend="none",