Remove Ruby 3.0 and add Ruby 3.3 to yard jobs

What does this merge request do and why?

The yard: [3.0] job has been failing because the multi_xml-0.7.1 gem requires Ruby 3.1.2 and is incompatible with Ruby 3.0. To fix this, we're removing Ruby 3.0 and adding Ruby 3.3 to get ready for upgrading to Ruby 3.3.

How to set up and validate locally

1. Install Ruby 3.3 and ensure you're using this version. For example, with asdf:

   asdf plugin update ruby
   asdf install ruby 3.3.4
   asdf exec ruby -v # Verify you're using Ruby 3.3.4

2. Ruby the yardoc command:

   asdf exec bundle exec yardoc

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.