### What this PR does / why we need it? The arg list of `Attention.forward()` is changed by https://github.com/vllm-project/vllm/pull/13555. The unused args `kv_caches` and `attn_metadata` are removed. ### Does this PR introduce _any_ user-facing change? N/A ### How was this patch tested? CI passed with existing test. Signed-off-by: MengqingCao <cmq0113@163.com>