Streamlining Tagging in Terraform projects.

Tagging resources in Azure or AWS Terraform projects used to be such a mind-numbing pain before the release of Terraform 0.12. For each resource in a Terraform project, the tag section was very verbose and very repetitive.  Now, with new variable functionality that comes with Terraform 0.12, I've fallen into a much more streamlined way of maintaining tags.
Tagging before Terraform 0.12