pgsql: Expand test a bit

Expand test a bit

Make pg_constraint output in inherit test show the convalidated column
as well.  This shows the interaction between convalidated and
conenforced.

This is extracted from a larger patch so that this reformatting isn't
distracting there.

Author: Amul Sul <amul.sul@enterprisedb.com>
Discussion:
https://www.postgresql.org/message-id/flat/CAAJ_b962c5AcYW9KUt_R_ER5qs3fUGbe4az-SP-vuwPS-w-AGA@mail.gmail.com

Branch
------
master

Details
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https://git.postgresql.org/pg/commitdiff/5d5f415816a60a3c5c5e4420eff55e73edfbd9f5

Modified Files
--------------
src/test/regress/expected/inherit.out | 66 +++++++++++++++++------------------
src/test/regress/sql/inherit.sql      |  2 +-
2 files changed, 34 insertions(+), 34 deletions(-)