* Fix: only "warn" when restart is required
Motivation: my logs are flooded with "warnings" when I run roles against instances.
So even though I understand for this "warning", it's a false positive when nothing
needs to be done.
* Update changelogs/fragments/651-fix-postgresql_set-warning.yaml
Co-authored-by: Andrew Klychkov <aaklychkov@mail.ru>
Co-authored-by: Andrew Klychkov <aaklychkov@mail.ru>