Add asdf-install target for gitlab and gitlab/workhorse

What does this merge request do and why?

This MR introduces gitlab-asdf-install and gitlab-workhorse-asdf-install targets.

Related to #1635 (closed)

How to set up and validate locally

1. git checkout 1635-asdf-install-in-gitlab
2. GDK_SELF_UPDATE=0 gdk update

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Installing asdf tools from /Users/naohashizume/src/gdks/gdk5/gitlab/.tool-versions
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gitleaks 8.16.4 is already installed
minio 2022-07-15T03-44-22Z is already installed
nodejs 18.17.0 is already installed
postgres 14.9 is already installed
postgres 13.12 is already installed
redis 7.0.14 is already installed
ruby 3.1.4 is already installed
rust 1.73.0 is already installed
vale 2.29.6 is already installed
yarn 1.22.19 is already installed

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Installing asdf tools from /Users/naohashizume/src/gdks/gdk5/gitlab/workhorse/.tool-versions
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golang 1.21.5 is already installed

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.