Modify CI Pipeline - Spin up GitLab container to be used with CustomersDot
# Background CustomersDot images are [built and published](https://gitlab.com/gitlab-org/customers-gitlab-com/-/issues/5351). They are able to be pulled and run locally using Docker. # Problem CustomersDot is designed to interoperate with GitLab. This container _can_ be configured with a local GDK instance, but it would be best if a pre-configured GitLab container were able to be run in CI. # Proposal Provide the ability to run both CustomersDot <-> GitLab Docker containers configured to work seamlessly with one another, and have the ability to run these both locally and in CI.
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