There were discrepancies between the postgresql.conf templates in the repository and the most
current templates. The templates where thus refreshed to make comparisons between versions easier.
In summary, the following was changed:
- user customisations were reset to package defaults (log handling, port, ...)
- backported settings and comments were included (data_sync_retry, krb_server_keyfile, ...)
- role customisation were reset to package defaults (includes)

- The postgresql.conf-16.j2 template was compiled from its package template.
- Added postgres 16 settings the role defaults. (>= 16)
- Annotated deprecated role defaults. (<= 15)

- added missing required version hints for previous posgres versions 11, 12 and 13
- removed incorrect hints on:
  - postgresql_data_sync_retry: off is default for 10-16
  - postgresql_extension_destdir: "" is default for 10-16
  - postgresql_gin_fuzzy_search_limit: 0 is default for 10-16
- added comments from templates to some defaults

Due to changes in 8bc5ff2, on Ubuntu 22.04 installations variables from Debian_22.yml are imported
instead of Debian.yml. This leads to postgresql_service_name not being set and thus, the playbook
was unable to reload the service on configuration changes.

On the 3 January 2024, PostgreSQL has updated their RPM GPG keys:
https://yum.postgresql.org/news/pgdg-rpm-repo-gpg-key-update/