pgsql: pg_restore: Fix comment handling with --no-policies.

pg_restore: Fix comment handling with --no-policies.

Previously, pg_restore did not skip comments on policies even when
--no-policies was specified. As a result, it could issue COMMENT commands
for policies that were never created, causing those commands to fail.

This commit fixes the issue by ensuring that comments on policies
are also skipped when --no-policies is used.

Backpatch to v18, where --no-policies was added in pg_restore.

Author: Jian He <jian(dot)universality(at)gmail(dot)com>
Co-authored-by: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>
Discussion: https://postgr.es/m/CACJufxHCt00pR9h51AVu6+yPD5J7JQn=7dQXxqacj0XyDhc-fA@mail.gmail.com
Backpatch-through: 18

Branch
------
REL_18_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/2ddbfede0c615c009bbbb0f8dfcaa848da5d2376

Modified Files
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src/bin/pg_dump/pg_backup_archiver.c | 7 +++++-
src/bin/pg_dump/t/002_pg_dump.pl | 46 ++++++++++++++++++++++++++++++++++++
2 files changed, 52 insertions(+), 1 deletion(-)