Test Fedora bootstrap in CI

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What does this merge request do and why?

Fedora is listed as supported OS in README.md, so it should be tested.

Closes #1636

Roadmap / TODO

• Run once a month
  • If run fails, create/update issue
• Make resulting installation available for download
• Move script shenanigans into GDK

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

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.
• Announcement added, if change is notable.
• gdk doctor test added, if needed.