Terraform's swift backend is deprecated and needs to be replaced with another - probably PostgreSQL backend

[jlqfab]

Terraform's swift backend was removed in Terraform v1.3. and S3 backend appears not to be suitable for OpenStack. Terraform provides a PostgreSQL pg backend which will work with an Openstack Trove "Database as a Service" instance.

This needs to be investigated and a solution for storing Terraform state to replace swift containers found.

Also this directly affects PR #2022 which has no backend at the moment.

See:

• OpenStack mailing list discussion: [swift] Terraform has deprecated the Swift backend
• Terraform pg backend
• OpenStack Trove