Database Migration Service quick-start migrations (in Preview)

## Feature Feature [Database Migration Service quick-start migrations](https://cloud.google.com/alloydb/docs/quick-start-migrations-guide)(in [Preview](https://cloud.google.com/products#product-launch-stages)) are now integrated into AlloyDB to provide a lightweight, continuous migration flow. This feature automates setup for sources with private IPs in a VPC network, including Cloud SQL for PostgreSQL and self-managed databases on Compute Engine. For more information, see[Quick-start migrations overview](https://cloud.google.com/database-migration/docs/about-quick-start-migrations)in the Database Migration Service documentation.