Add links to playbook definitions to playbook template
Adding links to the playbook template to make it easy to edit the playbook and the template.
Related to https://gitlab.com/gitlab-com/gl-infra/production-engineering/-/issues/25384
Adding links to the playbook template to make it easy to edit the playbook and the template.
Related to https://gitlab.com/gitlab-com/gl-infra/production-engineering/-/issues/25384