[Main2Main] Upgrade vLLM to 0226 (#6813)

### What this PR does / why we need it?

Breaking:
1. https://github.com/vllm-project/vllm/pull/33452
2. https://github.com/vllm-project/vllm/pull/33451
3. https://github.com/vllm-project/vllm/pull/32567
4. https://github.com/vllm-project/vllm/pull/32344

### Does this PR introduce _any_ user-facing change?

### How was this patch tested?

- vLLM version: v0.15.0
- vLLM main:
83b47f67b1

---------

Signed-off-by: MrZ20 <2609716663@qq.com>
Signed-off-by: gcanlin <canlinguosdu@gmail.com>
Co-authored-by: MrZ20 <2609716663@qq.com>

vllm_ascend/platform.py

@@ -468,7 +468,7 @@ class NPUPlatform(Platform):
         _CUSTOM_OP_REGISTERED = True
 
     @classmethod
-    def get_attn_backend_cls(cls, selected_backend, attn_selector_config):
+    def get_attn_backend_cls(cls, selected_backend, attn_selector_config, num_heads: int | None = None):
         key = (attn_selector_config.use_mla, attn_selector_config.use_sparse)
 
         backend_map = {