ci: add support to install terraform (#2914)

Author: remyleone

.github/workflows/nightly.yml

@@ -48,6 +48,8 @@ jobs:
       # Checkout should always be before setup-go to ensure caching is working
       - name: Checkout
         uses: actions/checkout@v4
+      - name: Install Terraform
+        uses: hashicorp/setup-terraform@v3
       - name: Install Go
         uses: actions/setup-go@v5
         with: