Refactor: controller: Drop replace notify callback

Every time a CIB replace notification is sent, a CIB diff notification
is also sent. So move the do_cib_replaced() logic into do_cib_updated()
and drop do_cib_replaced().

Check the patchset directly instead of checking change section flags.

Signed-off-by: Reid Wahl <nrwahl@protonmail.com>