[Task]: Add YAML examples using Cloud SQL

### What needs to happen?

This need to use the jdbc connection string from Cloud SQL, e.g., jdbc:postgresql:///test_db?cloudSqlInstance=my_projectt:us-central1:my-instance-name&socketFactory=com.google.cloud.sql.postgres.SocketFactory"

### Issue Priority

Priority: 2 (default / most normal work should be filed as P2)

### Issue Components

- [ ] Component: Python SDK
- [ ] Component: Java SDK
- [ ] Component: Go SDK
- [ ] Component: Typescript SDK
- [ ] Component: IO connector
- [x] Component: Beam YAML
- [ ] Component: Beam examples
- [ ] Component: Beam playground
- [ ] Component: Beam katas
- [ ] Component: Website
- [ ] Component: Infrastructure
- [ ] Component: Spark Runner
- [ ] Component: Flink Runner
- [ ] Component: Samza Runner
- [ ] Component: Twister2 Runner
- [ ] Component: Hazelcast Jet Runner
- [ ] Component: Google Cloud Dataflow Runner