[0.11.0][Perf] Add padding vision tower for Qwen2_5_Omni (#4041)

### What this PR does / why we need it?
This PR repalce the vision tower in Qwen2.5-Omni-Thinker model,
Qwen2_5_VisionTransformer, with AscendQwen2_5_VisionTransformer, which
use QKV padding for padding performance.

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

Signed-off-by: Ting FU <futing10@huawei.com>

vllm_ascend/models/__init__.py

@@ -23,6 +23,10 @@ def register_model():
             "Qwen2_5_VLForConditionalGeneration",
             "vllm_ascend.models.qwen2_5_vl:AscendQwen2_5_VLForConditionalGeneration"
         )
+        ModelRegistry.register_model(
+            "Qwen2_5OmniModel",
+            "vllm_ascend.models.qwen2_5_omni_thinker:AscendQwen2_5OmniThinkerForConditionalGeneration"
+        )
     else:
         ModelRegistry.register_model(
             "Qwen2_5_VLForConditionalGeneration",