### What this PR does / why we need it? 1. drop some useless code for w8a8 fusedmoe 2. Add in8 kv cache check 3. Add more ut. ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? CI passed with new added test. --------- Signed-off-by: zhuyilin <809721801@qq.com> Signed-off-by: tianyitang <tangtianyi4@huawei.com> Co-authored-by: tianyitang <tangtianyi4@huawei.com>