chore: 🤖 add terraform binary to test action

terraform binary no longer supplied with ubuntu runner image

.github/workflows/unit.yml

@@ -31,6 +31,13 @@ jobs:
         uses: actions/setup-go@v5
         with:
           go-version: 1.21.6
+
+      - name: Setup Terraform
+        uses: hashicorp/setup-terraform@v3
+        with:
+          terraform_version: "1.2.5"
+          terraform_wrapper: false
+
       - name: Run Terratest Unit Tests
         run: |
           go mod download