Add availability_zone argument

ChangeLog:

• add the ability to specify which availability zones to use

Changes to main outputs

ChangeLog:

• Remove backend definition from root module
• Change main outputs to snake case

Add Conditional VPC creations

Change log:

• Add create_vpc for conditional module deployments
• Update to latest cloud_workspace module 0.0.2
• Update min terraform version to 1.0.1

Update dependancies

Update aws-label module to use aws-ia namespace

Initial port from aws-quickstart

This module moved from the namespace aws-quickstart to aws-ia (Note: Versions were reset)