Mooncake store use adxl inferface (#3350)

Use adxl inferface in mooncake store, mooncake PR
https://github.com/kvcache-ai/Mooncake/pull/929

- vLLM version: v0.11.0rc3
- vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0

---------

Signed-off-by: LCAIZJ <leichao139636@163.com>

vllm_ascend/distributed/mooncake/transfer_engine.py

@@ -0,0 +1,28 @@
+import threading
+from typing import Optional
+
+from mooncake.engine import TransferEngine  # type: ignore
+
+_global_te = None
+_global_te_lock = threading.Lock()
+
+
+def get_global_te(hostname: str, device_name: Optional[str]):
+    global _global_te
+    if _global_te is None:
+        with _global_te_lock:
+            # Double-Checked Locking
+            if _global_te is None:
+                if TransferEngine is None:
+                    raise RuntimeError("mooncake is not available")
+                transfer_engine = TransferEngine()
+                device_name = device_name if device_name is not None else ""
+                ret_value = transfer_engine.initialize(hostname,
+                                                       "P2PHANDSHAKE",
+                                                       "ascend", device_name)
+                if ret_value != 0:
+                    raise RuntimeError(
+                        f"TransferEngine initialization failed with ret_value: {ret_value}"
+                    )
+                _global_te = transfer_engine
+    return _global_te