[Feature][main]reconstruction kvpool connector to ascend connector (#4438)

### What this PR does / why we need it?
1.In short, we renamed the existing MooncakeStoreConnector to
AscendStoreConnector and extracted the storage engine interaction logic
into a new Backend class.
Associated RFC：https://github.com/vllm-project/vllm-ascend/issues/4329
2.Fixed the issue where the number of input parameters for the connector
was incorrect, introduced in vllm 0.11.2
### Does this PR introduce _any_ user-facing change?
change MooncakeStoreConnector to AscendStoreConnector
### How was this patch tested?

- vLLM version: v0.11.2

---------

Signed-off-by: fems14 <1804143737@qq.com>

vllm_ascend/distributed/mooncake_layerwise_connector.py

@@ -30,6 +30,7 @@ from vllm.distributed.parallel_state import (get_tensor_model_parallel_rank,
 from vllm.utils import logger
 from vllm.utils.network_utils import get_ip, make_zmq_path, make_zmq_socket
 from vllm.v1.core.sched.output import SchedulerOutput
+from vllm.v1.kv_cache_interface import KVCacheConfig
 
 import vllm_ascend.envs as envs_ascend
 from vllm_ascend.ascend_config import get_ascend_config
@@ -359,7 +360,10 @@ class MooncakeLayerwiseConnectorMetadata(KVConnectorMetadata):
 
 class MooncakeLayerwiseConnector(KVConnectorBase_V1):
 
-    def __init__(self, vllm_config: VllmConfig, role: KVConnectorRole):
+    def __init__(self,
+                 vllm_config: VllmConfig,
+                 role: KVConnectorRole,
+                 kv_cache_config: Optional[KVCacheConfig] = None):
         assert vllm_config.kv_transfer_config is not None
         self.engine_id = vllm_config.kv_transfer_config.engine_id
         self._connector_metadata = MooncakeLayerwiseConnectorMetadata()