Migrate charts/gitlab to gitlab-org/charts/gitlab

In an effort to consolidate projects in the gitlab-org group, we need to move existing charts/gitlab projects to gitlab-org/charts/gitlab. This issue will serve as a central location to understand and record dependencies.

Status update

Project	Contain images?	Will be migrated?	Reason (if any)	Notes	Migrated yet?
gitlab-runner	No	Yes			Yes
deploy-image-helm-base	Yes	Yes		Because images aren't created by CI, yet. I have them "preserved" in my local machine and https://gitlab.com/balasankarc/deploy-image-helm-base/container_registry (I don't know if the latter will be deleted when I delete the original images).	Yes
GitLab	Yes	Yes		* There is a docker image in the registry. AFAIU we don't use it anymore in any of the currently active versions (latest and three backports). Still, I have a copy in my local machine and in https://gitlab.com/balasankarc/gitlab/container_registry. Also, we need to tackle the label situation mentioned in #422 (comment 209959626).	Yes
gitlab-operator	Yes	Yes, but will not be moved.	Already public URL that users use, like CNG.	We will have a import of the project in gitlab-org/charts and that will be the canonical source. The existing images will remain available at the old locations, but we will not be doing ongoing development there.	Yes
charts.gitlab.io	No	No	Already public URL that users use.	Will not be doing anything with it right now. Opened #485 for discussing
gitlab-marketplace-app	No	No	Deprecated now that we incorporated all the changes from the fork to upstream
deploy-image	No	No	Deprecated in favor of deploy-image-helm-base
kubernetes-gitlab-demo	No	No	Deprecated in favor of gitlab-omnibus
gitlab-omnibus	No	No	Deprecated in favor of current CNG charts
alpine-helm	Yes	No		Images in the registry are used by CI of charts.gitlab.io (and some deprecated charts). Let's move this image to https://gitlab.com/gitlab-org/gitlab-build-images and update active images to use it.