### What this PR does / why we need it?
Qwen3.5 full attention supports enabling the split_qkv_rmsnorm_mrope
fusion operator.
### How was this patch tested?
vLLM version: v0.16.0
vLLM-Ascend main: https://github.com/vllm-project/vllm-ascend/pull/6730
- vLLM version: v0.17.0
- vLLM main:
4034c3d32e
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Signed-off-by: ZhuQi-seu <zhuqi12@huawei.com>