[Ops] Add layernorm for qwen3Next (#5765)

### 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

---------

Signed-off-by: SunnyLee219 <3294305115@qq.com>

.github/workflows/nightly_test_a2.yaml

@@ -54,7 +54,7 @@ jobs:
             tests: tests/e2e/nightly/single_node/models/test_qwen3_8b.py
           - name: qwen3next
             os: linux-aarch64-a2-4
-            ests: tests/e2e/nightly/single_node/models/test_qwen3_next.py
+            tests: tests/e2e/nightly/single_node/models/test_qwen3_next.py
           - name: qwen3-32b
             os: linux-aarch64-a2-4
             tests: tests/e2e/nightly/single_node/models/test_qwen3_32b.py