The destroy plan should not require a configured provider (the complete
configuration is not evaluated, so they cannot be configured).
Deposed instances were being refreshed during the destroy plan, because
this instance type is only ever destroyed and shares the same
implementation between plan and walkPlanDestroy. Skip refreshing during
walkPlanDestroy.
This is part of a general effort to move all of Terraform's non-library
package surface under internal in order to reinforce that these are for
internal use within Terraform only.
If you were previously importing packages under this prefix into an
external codebase, you could pin to an earlier release tag as an interim
solution until you've make a plan to achieve the same functionality some
other way.
