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/ut/test_ascend_config.py

@@ -56,6 +56,9 @@ class TestAscendConfig(TestBase):
         self.assertTrue(torchair_graph_config.enable_frozen_parameter)
         self.assertFalse(torchair_graph_config.enable_kv_nz)
 
+        ascend_scheduler_config = ascend_config.ascend_scheduler_config
+        self.assertFalse(ascend_scheduler_config.enabled)
+
     @_clean_up_ascend_config
     def test_init_ascend_config_with_additional_config(self):
         test_vllm_config = VllmConfig()
@@ -71,6 +74,9 @@ class TestAscendConfig(TestBase):
                 "enable_kv_nz": True
             },
             "multistream_overlap_shared_expert": True,
+            "ascend_scheduler_config": {
+                "enabled": True
+            },
             "expert_map_path": "test_expert_map_path",
             "refresh": True,
         }
@@ -88,6 +94,9 @@ class TestAscendConfig(TestBase):
         self.assertTrue(torchair_graph_config.enable_frozen_parameter)
         self.assertTrue(torchair_graph_config.enable_kv_nz)
 
+        ascend_scheduler_config = ascend_config.ascend_scheduler_config
+        self.assertTrue(ascend_scheduler_config.enabled)
+
     @_clean_up_ascend_config
     def test_init_ascend_config_with_refresh(self):
         test_vllm_config = VllmConfig()