[BugFix]GPQA Accuracy Issue Bugfix (#3476)

### What this PR does / why we need it?
The GPQA dataset accuracy in the PD separation scenario of testing is
33.2, which does not meet the paper's requirement of 70. Resolve this
accuracy issue.
### Does this PR introduce _any_ user-facing change?

### How was this patch tested?
qpqa has accuracy issues, but modifying the code can ensure the accuracy
meets the standard

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

---------

Signed-off-by: fjw <2270923832@qq.com>

vllm_ascend/distributed/mooncake/mooncake_store_connector_v1.py

@@ -163,6 +163,8 @@ class MooncakeStoreConnectorV1Scheduler:
         self.client = MooncakeLookupClient(vllm_config)
         self.use_layerwise = use_layerwise
         self.kv_role = vllm_config.kv_transfer_config.kv_role
+        self.consumer_is_to_load = vllm_config.kv_transfer_config.kv_connector_extra_config.get(
+            "consumer_is_to_load", False)
         # request_id -> (vllm cached tokes, mooncake cached tokens)
         self.load_specs: dict[str, LoadSpec] = {}
         self._block_size = vllm_config.cache_config.block_size
@@ -192,6 +194,8 @@ class MooncakeStoreConnectorV1Scheduler:
             the number of tokens that can be loaded from the
             external KV cache beyond what is already computed.
         """
+        if self.kv_role == "kv_consumer" and not self.consumer_is_to_load:
+            return 0, False
 
         if self._discard_partial_chunks:
             token_block_end = len(request.prompt_token_ids
@@ -481,4 +485,4 @@ class MooncakeLookupServer:
 
     def close(self):
         self.socket.close(linger=0)
-        # TODO: close the thread!
+        # TODO: close the thread!