pgsql: Revert "Propagate CTE property flags when copying a CTE list int

Revert "Propagate CTE property flags when copying a CTE list into a rule."

This reverts commit ed290896335414c6c069b9ccae1f3dcdd2fac6ba and
equivalent back-branch commits. The issue is subtler than I thought,
and it's far from new, so just before a release deadline is no time
to be fooling with it. We'll consider what to do at a bit more
leisure.

Discussion: https://postgr.es/m/CAJcOf-fAdj=nDKMsRhQzndm-O13NY4dL6xGcEvdX5Xvbbi0V7g@mail.gmail.com

Branch
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REL_13_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/ac1df003f253cfeff700558a55274d709340f829

Modified Files
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src/backend/rewrite/rewriteHandler.c | 6 ------
src/test/regress/expected/with.out | 27 ---------------------------
src/test/regress/sql/with.sql | 16 ----------------
3 files changed, 49 deletions(-)