Allow `/stormkit deploy` to be typed by others in the team on GitLab

[svedova]

One of our customers wrote:

so we currently set up stormkit do only build on demand (to save on bandwith and costs and what not) because it seems to get out of hand. So now someone opened an MR, I want to review it but am not sure about the visual changes, so I wanted to trigger a stormkit build on that MR and I didn’t want to write the MR author to do that for me

Implementation plan

Currently only MR authors are allowed to deploy using the /stormkit deploy comment. We had this as a security feature because as far as I remember, the permission level is not passed with the author information when using GitLab API.

• [ ] Double check if the author information has a permission level
• [ ] If it's not available, check if the project has a visibility. For private projects we do not need this check.- so anyone would be able to deploy using the link.

[svedova]

Closing issue, this one is resolved for private projects. If the visibility of a project is INTERNAL or PRIVATE, Stormkit allows any member to execute the command. If the visibility of a project is PUBLIC then only the MR author can deploy.