dist: add scyllaio-setup.service for %systemd_post and %systemd_preun on .rpm
dist: add scyllaio-setup.service for %systemd_post and %systemd_preun on .rpm

This is needed for initialize the service correctly

Signed-off-by: Takuya ASADA <4ebfb6f510af412d6e89fefa3ab96d9c8b5e3fff@scylladb.com>

kjniemi/scylla,scylladb/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla,raphaelsc/scylla,kjniemi/scylla,avikivity/scylla,raphaelsc/scylla,duarten/scylla,duarten/scylla,raphaelsc/scylla,avikivity/scylla,duarten/scylla,kjniemi/scylla,scylladb/scylla