[Feature]Migrate helios example (#4569)

Signed-off-by: princepride <wangzhipeng628@gmail.com>

tests/model_extras/test_model_extras.py

@@ -57,6 +57,36 @@ def test_sensenova_extra_registry_declares_request_and_response_params() -> None
     assert should_init_extra_args_for_non_diffusion_stages("SenseNovaU1Pipeline") is False
 
 
+@pytest.mark.core_model
+@pytest.mark.cpu
+def test_helios_extra_registry_declares_request_and_response_params() -> None:
+    expected_body = frozenset(
+        {
+            "is_enable_stage2",
+            "pyramid_num_stages",
+            "pyramid_num_inference_steps_list",
+            "is_amplify_first_chunk",
+            "is_skip_first_chunk",
+            "use_cfg_zero_star",
+            "use_zero_init",
+            "zero_steps",
+            "image",
+            "video",
+            "add_noise_to_image_latents",
+            "image_noise_sigma_min",
+            "image_noise_sigma_max",
+            "add_noise_to_video_latents",
+            "video_noise_sigma_min",
+            "video_noise_sigma_max",
+        }
+    )
+    # Both the base and pyramid class names resolve to the same declaration.
+    for cls in ("HeliosPipeline", "HeliosPyramidPipeline"):
+        assert get_extra_body_params(cls) == expected_body
+        assert get_extra_output_params(cls) == frozenset()
+        assert should_init_extra_args_for_non_diffusion_stages(cls) is False
+
+
 @pytest.mark.core_model
 @pytest.mark.cpu
 def test_unknown_pipeline_has_empty_extra_registry() -> None: