repair: Log keyspace and table name in repair_cf_range
repair: Log keyspace and table name in repair_cf_range

When a repair failed, we saw logs like:

   repair - Checksum of range (8235770168569320790, 8235957818553794560] on
   127.0.0.1 failed: std::bad_alloc (std::bad_alloc)

It is hard to tell which keyspace and table has failed.

To fix, log the keyspace and table name. It is useful to know when debugging.

Fixes #4166
Message-Id: <b94be03934b311e2f0fad729f3ad6c7fe5b5160e@scylladb.com>

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