### What this PR does / why we need it?
Add the missing `apply_router_weight_on_input` in FusedMoE init
Quick fix on
https://github.com/vllm-project/vllm-ascend/pull/2268#discussion_r2265828849
### Does this PR introduce _any_ user-facing change?
N/A
### How was this patch tested?
CI passed with existing test.
- vLLM version: v0.10.0
- vLLM main:
6807af8f46
Signed-off-by: MengqingCao <cmq0113@163.com>