Fix CREATE TABLE LIKE with not-valid check constraint
In CREATE TABLE ... LIKE, any check constraints copied from the source
table should be set to valid if they are ENFORCED (the default).
Bug introduced in commit
ca87c415e2f.
Author: jian he <jian.universality@gmail.com>
Discussion: https://www.postgresql.org/message-id/CACJufxH%3D%2Bod8Wy0P4L3_GpapNwLUP3oAes5UFRJ7yTxrM_M5kg%40mail.gmail.com