Included the gpg package as requirements for Debian

[tziuhtli]

Either the gpg or the apt-key package is required for the ansible.builtin.apt_repository module. Neither of them are present in debian cloud images and must be installed manually. See for example https://cloud.debian.org/images/cloud the generic or genericcloud images.

Added gpg to the dependencies task.

[tziuhtli]

Also reordered tasks so installation of requirements runs before ansible.builtin.apt_repository is called.

This role assumes that apt has its repositories up-to-date. This is not the case in a brand new install of a Debian cloud image VM, where the gpg package is not even in there! We could add update_cache: true to the "Ensure dependencies are installed" task. But it slows down the whole role a little bit. And perhaps it is better to run a separate update/upgrade playbook. On the other hand, without the cache up to date, the role still fails. Anyway, if you merge this, you might consider adding the cache update. :) In any case, thanks!