enable request logging when debug is enabled

[fantapop]

Previously, enabling debug for the tf provider did not log out requests. The cloud sdk already supported a debug mode. We now enable this via configuration if one of the terraform debug env vars (TF_LOG_PROVIDER or TF_LOG) are set to either "DEBUG" or "TRACE".

Commit checklist

• [x] Changelog
• [ ] Doc gen (make generate)
• [ ] Integration test(s)
• [ ] Acceptance test(s)
• [ ] Example(s)