Add bao command

Ref: #2173 (closed)

What does this merge request do and why?

This MR adds a new gdk command to avoid running a rake task in the gdk directory.

➜  gitlab-development-kit git:(morefice/add-bao-command) ✗ bao auth list
Error listing enabled authentications: Error making API request.

URL: GET http://gdk.test:8200/v1/sys/auth
Code: 503. Errors:

* Vault is sealed
➜  gitlab-development-kit git:(morefice/add-bao-command) ✗ gdk bao configure
The root token is: s.TeZiQBQysQ3W9aHj1BezmQzQ
✅️ OpenBao has been unsealed successfully

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.