don't add config nodes during destroy plan

We want to use the normal plan graph for destroy, so we need to flag off
configuration for that process.

internal/terraform/transform_config.go

@@ -28,6 +28,9 @@ type ConfigTransformer struct {
 	// Mode will only add resources that match the given mode
 	ModeFilter bool
 	Mode       addrs.ResourceMode
+
+	// destroyPlan indicated this is being called from a destroy plan.
+	destroyPlan bool
 }
 
 func (t *ConfigTransformer) Transform(g *Graph) error {
@@ -36,6 +39,11 @@ func (t *ConfigTransformer) Transform(g *Graph) error {
 		return nil
 	}
 
+	// Configured resource are not added for a destroy plan
+	if t.destroyPlan {
+		return nil
+	}
+
 	// Start the transformation process
 	return t.transform(g, t.Config)
 }