pgsql: Fix CREATE TABLE LIKE with not-valid check constraint

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

Branch
------
REL_18_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/21fdc37d219acebd298d2e7b309b111a5174ae4c

Modified Files
--------------
src/backend/parser/parse_utilcmd.c              | 3 +--
src/test/regress/expected/create_table_like.out | 8 ++++++++
src/test/regress/sql/create_table_like.sql      | 1 +
3 files changed, 10 insertions(+), 2 deletions(-)