feat: Add validation of renovate config

mentioned in merge request asdf-gl-infra!22 (merged)

mentioned in merge request gitlab-com/runbooks!5090 (merged)

mentioned in merge request common-ci-tasks-images!30 (merged)

mentioned in merge request !216 (merged)

mentioned in merge request gitlab-org/release-tools!2038 (merged)

mentioned in merge request fluentd-docker!27 (merged)

mentioned in merge request woodhouse!209 (merged)

mentioned in merge request es-diagnostics!15

mentioned in merge request gitlab-com/gl-infra/k8s-workloads/common!208 (merged)

mentioned in merge request slackline!106 (merged)

mentioned in merge request cmbr!115 (merged)

mentioned in merge request pmv!162 (merged)

mentioned in merge request terra-transformer!151 (merged)

mentioned in merge request bigquery-loader!62 (merged)

mentioned in merge request gitlab-com/gl-infra/platform/runway/runwayctl!2 (merged)

mentioned in merge request gcp-quota-exporter!2 (merged)

mentioned in merge request es-diagnostics!18 (closed)

mentioned in merge request es-diagnostics!21