Update validation workflow

We need to download the vendor modules before we can validate it.

.github/workflows/lint.yml

@@ -52,6 +52,9 @@ jobs:
         run: terraform fmt -check -recursive
         working-directory: terraform
 
+      - name: Download vendor modules
+        run: make ci development terrafile
+
       - name: Validate
         run: |
           terraform init -backend=false