[BugFix]Fix wrong _cos, _sin instantiation (#5154)

### What this PR does / why we need it?
This PR add additional check on creating global `_cos` and `_sin`, avoid
creating them when using `mrope` or encoder-decoder model.

- vLLM version: v0.12.0
- vLLM main:
ad32e3e19c

Signed-off-by: Angazenn <supperccell@163.com>

vllm_ascend/utils.py

@@ -64,6 +64,7 @@ _HAS_LAYER_IDX = None
 _SUBSCRIBED_COMPUTE_STREAMS = set()
 _GRAPH_PRINT_STREAM = None
 _GRAPH_PRINT_STREAM_LOCK = Lock()
+_HAS_ROPE = None
 
 
 def _print_callback_on_stream(*args):
@@ -823,11 +824,24 @@ def is_vl_model(vllm_config: VllmConfig):
     """Checks if the model is a VL model by config"""
     global _IS_VL_MODEL
     if _IS_VL_MODEL is None and vllm_config and vllm_config.model_config:
-        model_configs = vllm_config.model_config.hf_config.to_dict()
-        _IS_VL_MODEL = "VL" in model_configs["architectures"][0]
+        hf_config = vllm_config.model_config.hf_config.to_dict()
+        if "thinker_config" in hf_config:
+            # Qwen-Omni-thinker models
+            _IS_VL_MODEL = True
+        else:
+            _IS_VL_MODEL = "vision_config" in hf_config
     return _IS_VL_MODEL
 
 
+def has_rope(vllm_config: VllmConfig):
+    """Checks if the model uses rope."""
+    global _HAS_ROPE
+    if _HAS_ROPE is None and vllm_config and vllm_config.model_config:
+        hf_config = vllm_config.model_config.hf_config.to_dict()
+        _HAS_ROPE = "rope_parameters" in hf_config
+    return _HAS_ROPE
+
+
 def weak_ref_tensor(tensor: Any) -> Any:
     """
     Create a weak reference to a tensor.