[BugFix][PCP] Fix presion bugs for pcp/dcp in PD disaggregate (#6876)

### What this PR does / why we need it?
Fix a bug for PD disaggregate of PCP/DCP, some conditions only consider
MLA while ignoring DSA.
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
- vLLM version: v0.15.0
- vLLM main:
15d76f74e2
- vLLM Ascend main: 81fb7d5779

Signed-off-by: tongyuzhou <tongyuzhou1@huawei.com>
Co-authored-by: tongyuzhou <tongyuzhou1@huawei.com>

vllm_ascend/distributed/kv_transfer/kv_p2p/mooncake_connector.py

@@ -1323,13 +1323,13 @@ class MooncakeConnectorWorker:
 
         def context_parallel_parameters_check():
             assert (meta.remote_pcp_size * meta.remote_dcp_size) % (self.pcp_size * self.dcp_size) == 0
-            if not self.use_mla:
+            if not (self.use_mla or self.use_sparse):
                 p_node_heads_per_rank = math.ceil(self.num_key_value_heads / prefill_tp_size)
                 d_node_heads_per_rank = math.ceil(self.num_key_value_heads / self.tp_size)
                 assert d_node_heads_per_rank % p_node_heads_per_rank == 0
 
         def get_kv_head_groups(tp_size):
-            if self.use_mla:
+            if self.use_mla or self.use_sparse:
                 kv_head_groups = []
                 kv_head_ids = [0]
                 kv_head_groups.append(tuple(kv_head_ids))