fix(terraform): render list entries via modules correctly

[gruebel]

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Description

• the example in linked issue explains the problem pretty well. we actually render the value, but we don't pass to the config attribute, therefore we still think it is unrendered, when we run any checks against it.
• during implementation I encountered various side effects, that's why I needed to write more code than expected

Fixes #3766

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my feature, policy, or fix is effective and works
• New and existing tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules