Add template for ArcGIS Server on Windows

[pbobov]

Add a template that provides GitHub Actions workflows for ArcGIS Server deployment & operations on Windows platform.

The template should use:

• Packer for AMI builds,
• Terraform for creating AWS resources,
• PowerShell DSC for application configuration, and
• Ansible to install PowerShell DSC modules and run PowerShell remotely using aws_ssm connection.

[pbobov]

Unfortunately, the AWS template for ArcGIS Server on Windows cannot be implemented using PowerShell DSC as it was planned originally. The ArcGIS PowerShell DSC modules do not support "solo" mode like the Chef cookbooks. The DSC modules require WinRM to orchestrate multi-machine deployments. WinRM requires an administrator user account with the same username and password on all the machines. In EC2 workgroup networks passwords are different for Administrator user on different EC2 instances. Creating another administrator user account with same password on all the EC2 instances is not a good security practice.

Branch issue112_draft contains an unfinished implementation of arcgis-server-windows template with draft workflows for building image, provisioning infrastructure, and creating ArcGIS Server site on primary machine.

@cameronkroeker @shailesh91