[SliceTransform] fixed prefix seek tests
[SliceTransform] fixed prefix seek tests

tecbot/gorocksdb,venugopalkandru/gorocksdb,venugopalkandru/gorocksdb,Ingeniosity/rdb,pippio/gorocksdb,arbortech/gorocksdb,Ingeniosity/rdb,daaku/gorocksdb,daaku/gorocksdb,unigraph/rdb,unigraph/rdb,rdallman/gorocksdb,rdallman/gorocksdb,tecbot/gorocksdb,rdallman/gorocksdb,unigraph/rdb,rdallman/gorocksdb,pippio/gorocksdb,arbortech/gorocksdb