[Model] Add LongCat-Flash (#3833)

### What this PR does / why we need it?
Add LongCat-Flash support.
### Does this PR introduce _any_ user-facing change?
N/A
### How was this patch tested?
CI passed

- vLLM version: v0.13.0
- vLLM main:
ad32e3e19c

---------

Signed-off-by: chuyuelin <923822139@qq.com>
Co-authored-by: chuyuelin <chuyuelin1@huawei.com>

vllm_ascend/worker/model_runner_v1.py

@@ -2240,9 +2240,10 @@ class NPUModelRunner(GPUModelRunner):
             kv_caches[layer_name] = kv_caches[target_layer_name]
 
         from vllm.v1.worker.utils import bind_kv_cache
+        num_attn_module = 2 if self.model_config.hf_config.model_type == "longcat_flash" else 1
         bind_kv_cache(kv_caches,
                       self.compilation_config.static_forward_context,
-                      self.kv_caches)
+                      self.kv_caches, num_attn_module)
         return kv_caches
 
     def _allocate_kv_cache_tensors(