Currently we manually create the EC2 instances where our services (blob, backup, tunnelbroker, identity) run. We should provision them using Terraform instead.
The ami selected is the latest Amazon Linux 2 AMI. We use the t2.micro instance type because it is part of the free tier.
Will follow this diff up with similar diffs for the other services.
Resolves https://linear.app/comm/issue/ENG-1927/provision-ec2-instances-with-terraform