chore: release v0.2.2

build: update build-harness-extensions

deps: update cloudinit module

deps: update to latest cloudinit module with new apt key

basically a rewrite

* ssh_public_key and ssh_private_key replace ssh_key to be uniform
  with other provider versions
* now uses EC2 rather than Lightsail
* now uses the shared cloudinit module rather than bespoke provisioner
* uses build-harness-extensions

Initial import