Fix `gdk update` issue with Fedora 37

What does this merge request do and why?

We remove all keywords related to postgres from packages_fedora.txt, since we're making use of asdf's PostgreSQL instead of the system package manager. packages_fedora.txt may however, need uuid-devel (sources).

How to set up and validate locally

Note: platform must be Fedora 37!

1. cd to gitlab-development-kit
2. Run gdk update

gdk doctor test

$ gdk doctor
..................
⚠️  WARNING: Your GDK may need attention.

asdf
================================================================================
You have the following software installed using asdf but GDK doesn't need them:

golang 1.19.3
postgres 12.10
ruby 3.0.4, 2.7.5, 3.1.1, 2.6.6
...

Impacted categories

The following categories relate to this merge request:

• gdk-reliability - e.g. When a GDK action fails to complete.
• gdk-usability - e.g. Improvements or suggestions around how the GDK functions.
• gdk-performance - e.g. When a GDK action is slow or times out.

Merge request checklist

• This change is backward compatible. If not, please include steps to communicate to our users.
• Tests added for new functionality. If not, please raise an issue to follow-up.
• Documentation added/updated, if needed.
• gdk doctor test added, if needed.
• Add the ~highlight label if this MR should be included in the CHANGELOG.md.

Closes #1646 (closed)