Use GDK::Output and :hide_output instead

What does this merge request do and why?

This MR fixes some noisy / misleading output when running make rspec.

Before

RSpec: ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................❌️ ERROR: 'asdf exec bundle exec rake --invalid' failed. ....................................................................................................................................................................................................................................................................................................................................................................Would you like to send the duration data? (yes/no): .Would you like to send the duration data? (yes/no): .......

After

RSpec: ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

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.

Closes #2033 (closed)