llama : add DRY sampler (#9702) * sampling : add DRY sampler (post-refactor) * DRY: Trying to fix coauthors, removed unneeded line * DRY: Fixed redundant code * DRY: Fixed crash issue due to DRY being in chain but uninitialized --------- Co-authored-by: l3utterfly <gc.pthzfoldr@gmail.com> Co-authored-by: pi6am <34464159+pi6am@users.noreply.github.com>