[Feat] A Connector that supports Mooncake store (#2913)

### What this PR does / why we need it?
Added a new connector for Mooncake store integration to enable kvcache
reuse in scenarios with system prompts or multi-turn dialogues.

### How was this patch tested?


- vLLM version: v0.10.2
- vLLM main:
5963b98b46

---------

Signed-off-by: LCAIZJ <leichao139636@163.com>
Signed-off-by: fems14 <1804143737@qq.com>
Co-authored-by: fems14 <1804143737@qq.com>
Co-authored-by: Dreamerleader <2270923832@qq.com>
Co-authored-by: Pz1116 <zpbzpb123123@gmail.com>
Co-authored-by: lizy124 <1950471827@qq.com>
Co-authored-by: zouyida2052 <zouyida2002@gmail.com>

vllm_ascend/distributed/__init__.py

@@ -26,3 +26,8 @@ KVConnectorFactory.register_connector(
 KVConnectorFactory.register_connector(
     "MooncakeConnectorV1", "vllm_ascend.distributed.mooncake_connector",
     "MooncakeConnector")
+
+KVConnectorFactory.register_connector(
+    "MooncakeConnectorStoreV1",
+    "vllm_ascend.distributed.mooncake.mooncake_store_connector_v1",
+    "MooncakeConnectorV1")