Can't diff gitlab-shell/.gitlab_shell_secret

What does this merge request do and why?

How to set up and validate locally

Using the main branch

You should see the following error:

$ rm -f gitlab-shell/.gitlab_shell_secret ; rake reconfigure ; make gitlab-shell/.gitlab_shell_secret
rake aborted!
Don't know how to build task 'gitlab-shell/.gitlab_shell_secret' (See the list of available tasks with `rake --tasks`)
Did you mean?  gitlab-shell/config.yml

Tasks: TOP => reconfigure => all
(See full trace by running task with --trace)

Using this branch (1789-verify-gitpod-docker-image-job-failing-with-don-t-know-how-to-build-task-gitlab-shell)

There should be no error:

$ rm -f gitlab-shell/.gitlab_shell_secret ; rake reconfigure ; make gitlab-shell/.gitlab_shell_secret

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 #1789 (closed)