repair: Rename send_row_diff to put_row_diff
repair: Rename send_row_diff to put_row_diff

Make it consistent with the row level repair rpc verb.

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