create_table_statement: prepare announce_migration for cdc
create_table_statement: prepare announce_migration for cdc

This patch wrapps announce_migration logic into a lambda
that will be used both when cdc is used and when it's not.

Signed-off-by: Piotr Jastrzebski <2c0eb4a25a7cde333ff2d0860cb06051925fd74f@scylladb.com>

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