sstables: add skip() to compressed_file_data_source
sstables: add skip() to compressed_file_data_source

Signed-off-by: Paweł Dziepak <e29bb3265626c60caf76d587cabdfcd8b379ef80@scylladb.com>

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