First iteration of a runbook for the license app using Auto Devops

This runbook can be used to manage the License application when it is moved into an Auto Devops deployment. It is mostly a copy of the version app runbook, with relevant parts changed.

Infra issue: https://gitlab.com/gitlab-com/gl-infra/infrastructure/-/issues/10077

Application issue: https://gitlab.com/gitlab-org/license-gitlab-com/-/issues/79