Move VPC module out to it's own repo

[sekka1]

Move this module out to it's own repository: https://github.com/ManagedKube/kubernetes-ops/tree/main/terraform-modules/aws/vpc

This will allow us to more cleanly update this module's lifecycle and provide clear releases for it.

Todo

• New repo
• Setup Terratest Github Actions
• Setup Github Action for a git tag release