Revert "drop ascend scheduler" (#4580)

Reverts vllm-project/vllm-ascend#4498
- vLLM version: v0.11.2
- vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.2

tests/e2e/multicard/test_qwen3_next.py

@@ -24,7 +24,6 @@ Run `pytest tests/e2e/multicard/test_qwen3_next.py`.
 import os
 from unittest.mock import patch
 
-import pytest
 from modelscope import snapshot_download  # type: ignore
 
 from tests.e2e.conftest import VllmRunner
@@ -64,8 +63,6 @@ def test_models_distributed_Qwen3_NEXT_TP4_FULL_DECODE_ONLY():
         del vllm_model
 
 
-@pytest.mark.skip(
-    reason="Qwen3-Next + MTP doesn't work with chunked prefill. Fix Me")
 def test_models_distributed_Qwen3_NEXT_MTP_TP4_SIMILARITY():
     example_prompts = [
         "Hello, my name is",
@@ -92,6 +89,12 @@ def test_models_distributed_Qwen3_NEXT_MTP_TP4_SIMILARITY():
                     gpu_memory_utilization=0.8,
                     distributed_executor_backend="mp",
                     enforce_eager=True,
+                    additional_config={
+                        "ascend_scheduler_config": {
+                            "enabled": True,
+                            "enable_chunked_prefill": False
+                        }
+                    },
                     speculative_config={
                         "method": "qwen3_next_mtp",
                         "num_speculative_tokens": 1