pgsql: Ignore generated columns during apply of update/delete.

Ignore generated columns during apply of update/delete.

We fail to apply updates and deletes when the REPLICA IDENTITY FULL is
used for the table having generated columns. We didn't use to ignore
generated columns while doing tuple comparison among the tuples from
the publisher and subscriber during apply of updates and deletes.

Author: Onder Kalaci
Reviewed-by: Shi yu, Amit Kapila
Backpatch-through: 12
Discussion: https://postgr.es/m/CACawEhVQC9WoofunvXg12aXtbqKnEgWxoRx3+v8q32AWYsdpGg@mail.gmail.com

Branch
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REL_14_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/9dac02c772587f1ff645ad5b97e55c5e1c6206ad

Modified Files
--------------
src/backend/executor/execReplication.c |  5 +++--
src/test/subscription/t/100_bugs.pl    | 18 ++++++++++++++----
2 files changed, 17 insertions(+), 6 deletions(-)