PostgreSQL update to v16

[joanhey]

Released September 14, 2023. https://www.postgresql.org/about/news/postgresql-16-released-2715/

After update the Citrine servers, it'll be good to first run with the last commit with full results, to compare the real differences with the new servers. Or wait to update the databases, after 1-2 full runs in the new servers.

And after check the new specs, we need also to check the database configurations.