IaC: Terragrunt support

Terragrunt is a thin wrapper that provides extra tools for keeping your configurations DRY, working with multiple Terraform modules, and managing remote state. Terragrunt functionality is similar to Terraform workspaces, but Terragrunt is much more elegant and robust. https://terragrunt.gruntwork.io/ https://github.com/gruntwork-io/knowledge-base/discussions/92