vllm

2b6b1d78 - [Model] Mamba2 varlen refactor (#21467)

[Model] Mamba2 varlen refactor (#21467) Signed-off-by: Chih-Chieh-Yang <7364402+cyang49@users.noreply.github.com> Co-authored-by: RishiAstra <40644327+RishiAstra@users.noreply.github.com>