[main][Bugfix] Remove the ZMQ communication setup on the D node (#4926)

In the PD separation scenario, the D node does not need to perform get
operations, and therefore does not need to create ZeroMQ (ZMQ)
communication.
- vLLM version: v0.12.0
- vLLM main:
ad32e3e19c

Signed-off-by: SlightwindSec <slightwindsec@gmail.com>

vllm_ascend/distributed/kvpool/ascend_store_connector.py

@@ -55,7 +55,7 @@ class AscendStoreConnector(KVConnectorBase_V1):
             )
 
             assert self.connector_worker is not None
-            if vllm_config.parallel_config.rank == 0:
+            if vllm_config.parallel_config.rank == 0 and self.kv_role != "kv_consumer":
                 self.lookup_server = LookupKeyServer(self.connector_worker,
                                                      vllm_config,
                                                      self.use_layerwise)