### What this PR does / why we need it? cherry-pick Fix performance degradation when mtp>1 (#3597) This PR aims to fix performance degradation when mtp>1. Since mtp>1 may result in more tokens (i.e. larger batch size) than acl graph maximum batch size, this will cause draft model to run in eager mode. ### How was this patch tested? by ci --------- Signed-off-by: Zetong Li <slippersss@126.com>