storage_service: Announce range tombstones feature
storage_service: Announce range tombstones feature

This patch enables the RANGE_TOMBSTONES supported feature, meaning
that the node is capable of accepting row entry tombstones as range
tombstones.

Signed-off-by: Duarte Nunes <a60e8b7496f7715d71354fe4c06dd24017025bf1@scylladb.com>

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