Include ap-southeast-3 in AWS Regions
Include ap-southeast-3 in AWS Regions

Add support for ap-southeast-3 which is now an official AWS region. See https://docs.aws.amazon.com/general/latest/gr/rande.html#regional-endpoints
rusoto/rusoto,rusoto/rusoto,DualSpark/rusoto,rusoto/rusoto,DualSpark/rusoto,DualSpark/rusoto