Implement a governance layer for provider warnings

[kislerdm]

Problem

The change added the warnings package to resolve. However, we have not clarity on how to govern warnings for any arbitrary provider. In other words, how can we make sure that we, as a governing body between the provider's user and the provider's maintainers, keep warnings and any additional provider's info consistently with intentions of the provider's maintainer.

Open questions

• Shall we warn tofu users when the provider they rely on is fetched from the archived github repo, a/k/a "deprecated"?
• How to make our warnings consistent with the intentions of provider's maintainers?