Fix: bundle destroy fails when bundle.tf.json file is deleted (#519)

## Changes

Adds the following steps to the destroy phase:
1. interpolate
2. write

Resolves #518 

## Tests

Tested manually due there not being an examples for tests to use.

bundle/phases/destroy.go

@@ -14,6 +14,8 @@ func Destroy() bundle.Mutator {
 		lock.Acquire(),
 		bundle.Defer(
 			bundle.Seq(
+				terraform.Interpolate(),
+				terraform.Write(),
 				terraform.StatePull(),
 				terraform.Plan(terraform.PlanGoal("destroy")),
 				terraform.Destroy(),