Refactor Terraform CI/CD workflow to use 'ssot-runner' and streamline job steps

.github/workflows/terraform.yaml

@@ -2,39 +2,33 @@ name: Terraform CI/CD
 
 on:
   push:
-    branches:
-      - "**"
   pull_request:
 
 jobs:
   terraform:
-    runs-on: ssot
+    runs-on: ssot-runner
+
+    container:
+      image: hashicorp/terraform:1.6.6
 
     steps:
+      - name: Install dependencies
+        run: |
+          apk add --no-cache nodejs npm git
+
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Setup Terraform
-        uses: hashicorp/setup-terraform@v3
-        with:
-          terraform_version: 1.6.6
-
       - name: Terraform Init
         run: terraform init -input=false
 
-      - name: Terraform Format
-        run: terraform fmt -check -recursive
-
       - name: Terraform Validate
         run: terraform validate
 
       - name: Terraform Plan
-        run: |
-          terraform plan \
-            -input=false \
-            -out=tfplan
+        run: terraform plan -input=false -out=tfplan
 
-      - name: Show Terraform Plan
+      - name: Show plan
         run: terraform show -no-color tfplan > plan.txt
 
       - name: Upload plan artifact