ci: use terraform for nightly tests

Author: kangasta

.github/workflows/opentofu.yml

@@ -2,8 +2,10 @@ name: OpenTofu
 
 on:
   workflow_dispatch:
-  schedule:
-    - cron: "0 0 * * *"
+  # Use terraform for nightly tests, because OpenTofu produces non-empty diff without changes in database tests.
+  # TODO: check these tests after related resources and data-sources are migrated to plugin framework.
+  # schedule:
+  #   - cron: "0 0 * * *"
   push:
     branches:
       - test-tofu-acctest # for testing

.github/workflows/terraform.yml

@@ -1,6 +1,9 @@
 name: Terraform
 
 on:
+  # TODO: remove this when switching to OpenTofu, see ./opentofu.yml
+  schedule:
+    - cron: "0 0 * * *"
   pull_request:
     paths:
       - .github/workflows/terraform.yml