When an SQS queue was deleted from the AWS Console, an error was thrown
to say that the Queue could not be found. This is now fixed to remove
the queue from the state on a specific not found exception
This landed in aws-sdk-go yesterday, breaking the AWS provider in many places:
3c259c9586
Here, with much sedding, grepping, and manual massaging, we attempt to
catch Terraform up to the new `awserr.Error` interface world.