repair: Make send_repair_checksum_range timeout
repair: Make send_repair_checksum_range timeout

If the verb never returns the repair will hangs forever. Make it use the
timeout version of the send_message.

Fixes #2662

avikivity/scylla,scylladb/scylla,duarten/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla,duarten/scylla,avikivity/scylla,duarten/scylla