Bundled PostgreSQL, Redis, and MinIO removed from GitLab Helm chart

The bundled Bitnami PostgreSQL, Bitnami Redis, and MinIO charts are removed from the GitLab Helm chart and GitLab Operator in GitLab 19.0 with no replacement. These components were intended only for proof-of-concept and test environments and are not recommended for production use. If you run an instance with any of these bundled services, follow the migration guide to configure external services before upgrading to GitLab 19.0.