🚀 `terraform_plan` tests should be done on `.tf` files instead on the "json-ned" plan file

[refeed]

Is your feature request related to a problem? Please describe. Nope, just a thought on enhancement on testing suites.

Describe the solution you'd like We can provide .tf files instead of the plan json for the input data, and then let the terraform binary convert it to the plan json files. This can make the testing more robust and reliable as we can use the latest terraform binary to convert the tf files to plan json, because there might be several structure changes from terraform.