fix: fix tests

[jamengual]

This pull request introduces a minor improvement to the GitHub Actions workflow and action metadata. The main changes involve cleaning up formatting in the workflow output and adding a new output to the action.

Action output enhancement:

• Added a new output has-changes to action.yml, which indicates whether the Terraform plan has changes, with the value being the string 'true' or 'false'.

Workflow formatting cleanup:

• Removed unnecessary blank lines in the expected and actual output sections of .github/workflows/test-failed-plan-drift.yml to improve output readability and consistency. [1] [2]

[github-actions]

Changes Found for foobar/changes in plat-ue2-sandbox

Plan: 1 to add, 0 to change, 0 to destroy.

To reproduce this locally, run:

atmos terraform plan foobar/changes -s plat-ue2-sandbox

---

Create

+ random_id.foo[0]

Terraform Plan Summary

  # random_id.foo[0] will be created
  + resource "random_id" "foo" {
      + b64_std     = (known after apply)
      + b64_url     = (known after apply)
      + byte_length = 8
      + dec         = (known after apply)
      + hex         = (known after apply)
      + id          = (known after apply)
      + keepers     = {
          + "seed" = "foo-plat-ue2-sandbox-blue"
        }
    }

Plan: 1 to add, 0 to change, 0 to destroy.

Warning: Test warning summary

  with data.validation_warning.warn[0],
  on main.tf line 20, in data "validation_warning" "warn":
  20: data "validation_warning" "warn" {

Test warning details

Warning

Warning: Test warning summary

  with data.validation_warning.warn[0],
  on main.tf line 20, in data "validation_warning" "warn":
  20: data "validation_warning" "warn" {

Test warning details