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_platform.py

@@ -32,6 +32,7 @@ class TestNPUPlatform(TestBase):
     def mock_vllm_ascend_config():
         mock_ascend_config = MagicMock()
         mock_ascend_config.torchair_graph_config.enabled = False
+        mock_ascend_config.ascend_scheduler_config.enabled = False
         mock_ascend_config.enable_shared_expert_dp = False
         return mock_ascend_config
 
@@ -521,6 +522,31 @@ class TestNPUPlatform(TestBase):
         self.platform.check_and_update_config(vllm_config)
         self.assertEqual(vllm_config.compilation_config.custom_ops, [])
 
+    @patch('vllm_ascend.utils.get_ascend_device_type',
+           return_value=AscendDeviceType._910_93)
+    @patch("vllm_ascend.ascend_config.check_ascend_config")
+    @patch("vllm_ascend.ascend_config.init_ascend_config")
+    @patch(
+        "vllm_ascend.core.recompute_schedule_config.RecomputeSchedulerConfig.initialize_from_config"
+    )
+    def test_check_and_update_config_ascend_scheduler_config(
+            self, mock_init_recompute, mock_init_ascend, mock_check_ascend,
+            mock_soc_version):
+        mock_ascend_config = TestNPUPlatform.mock_vllm_ascend_config()
+        mock_ascend_config.ascend_scheduler_config.enabled = True
+        mock_init_ascend.return_value = mock_ascend_config
+        vllm_config = TestNPUPlatform.mock_vllm_config()
+        vllm_config.parallel_config.tensor_parallel_size = 1
+        mock_init_recompute.return_value = MagicMock()
+
+        with patch("vllm_ascend.core.schedule_config.AscendSchedulerConfig"
+                   ) as mock_scheduler:
+            from vllm_ascend import platform
+
+            importlib.reload(platform)
+            self.platform.check_and_update_config(vllm_config)
+            mock_scheduler.initialize_from_config.assert_called_once()
+
     @patch('vllm_ascend.platform.get_ascend_config')
     def test_get_attn_backend_cls_use_v1_and_mla(self, mock_get_ascend_config):
         mock_config = MagicMock()