repair: Track repair_info
repair: Track repair_info

Make repair_info a shared pointer and store them in _repairs map so we
can find by the repair id and access them later.

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