Triggers GCP Cloud SQL export backups to GCS.

Solution documentation:

https://cloud.google.com/solutions/scheduling-cloud-sql-database-exports-using-cloud-scheduler

• main.py - the code
• requirements.txt - the pip modules to bootstrap
• deploy.sh - upload the code and deps

Upload the function to GCF in the current GCP project:

./deploy.sh

• a Cloud PubSub topic
• Cloud Scheduler jobs to trigger backups
  • see gcp_cloud_schedule_sql_exports.sh in DevOps Bash tools repo
• a service account with permissions to access Cloud SQL and the GCS bucket
  • see gcp_sql_exports_create_service_account.sh in DevOps Bash tools repo