Replace `make update` with ruby recipe

What does this merge request do and why?

This MR adds a declarative recipe system within Ruby as replacement for Makefiles for gdk update (and later potentially gdk install and gdk reconfigure). This is the first iteration to Show status spinner instead of logs in gdk update (!3733 - closed) and later even Draft: Parallelize gdk update (!3726).

This should cause no change to the output or behavior of gdk update.

How to set up and validate locally

1. Check out the branch
2. Run GDK_SELF_UPDATE=0 gdk update
3. See that all relevant updates have been performed

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.
• Add the ~highlight label if this MR should be included in the CHANGELOG.md.