### What this PR does / why we need it?
Add layernormFn triton op for qwen3Next model for better performance.
<img width="248" height="526" alt="image"
src="https://github.com/user-attachments/assets/27b47157-5df5-4db1-aa88-1dae799b2bf6"
/>
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
- vLLM version: v0.13.0
- vLLM main:
2f4e6548ef
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Signed-off-by: SunnyLee219 <3294305115@qq.com>