Set rules for prepare-service-health-dashboard-json

This MR fixes a bug as described in gitlab-com/gl-infra/scalability#830 (comment 1260306419) where externally triggered jobs fail on the generate_service_maturity_manifest step. e.g. https://gitlab.com/gitlab-com/runbooks/-/jobs/3675314908

This MR updates the rules for prepare-service-health-dashboard-json to ensure it runs for the following jobs

• generate_service_maturity_manifest - https://gitlab.com/gitlab-com/runbooks/-/blob/master/.gitlab-ci.yml#L690
• verify - https://gitlab.com/gitlab-com/runbooks/-/blob/master/.gitlab-ci.yml#L195
• ensure_maturity_model_minimum_level - https://gitlab.com/gitlab-com/runbooks/-/blob/master/.gitlab-ci.yml#L351
• test_dashboards - https://gitlab.com/gitlab-com/runbooks/-/blob/master/.gitlab-ci.yml#L568
• deploy_dashboards - https://gitlab.com/gitlab-com/runbooks/-/blob/master/.gitlab-ci.yml#L579