feat(recipe): adding ubuntu 22.04 support

updating cloud-init configuration for version compat. We now use an HCL2 template for cloud-init configuration. The variable cloud_init_runcmd allow you tu run commands at rc.local time during boot (cf: https://cloudinit.readthedocs.io/en/latest/topics/modules.html#runcmd) Warning: You can only use "strings" because the variable is a list of strings.

Fixes #39 (closed)