We make almost no use of the dynamic properties of the hcloud inventory,
so we can simplify this by declaring all cloud servers in the main hosts
inventory.

The main benefit of this change is that temporary and experimental cloud
servers are not automatically included in the Ansible playbooks. In such
cases it is usually incorrect to deploy changes to these unknown servers.

A smaller side benefit is that Ansible will now use hostnames to connect
to cloud servers, whereas the dynamic inventory provided IPv4 addresses.
This results in more meaningful ~/.ssh/known_hosts entries.

The idea bebind this is to be able to give vault access to new DevOps
members without giving away more important credentials like Hetzner's.

As per the following deprecation warning (even though it has a typo):

[DEPRECATION WARNING]: [defaults]callback_whitelist option, normalizing
names to new standard, use callback_enabled instead. This feature will
be removed from ansible-core in version 2.15.  Deprecation warnings can
be disabled by setting deprecation_warnings=False in ansible.cfg.

[1] https://github.com/ansible/ansible/pull/74845

This has multiple benefits:
- We don't have to wait until Ansible 2.8 (which will be when the official hcloud dynamic inventory provider will be included)
- We can expand the script to group servers by labels if required
- We can use the vault to automatically get the hetzner cloud token which is not possible otherwise

The profile_tasks plugin shows how much time the book run took and
also breaks down an individual view of how much time each task took
to complete.

Disable retry files by default. Those can be enabled on a per role
or per playbook basis.

Our ansible.cfg had some settings that were using the default values,
according to ansible documentation.

Signed-off-by: Florian Pritz <bluewind@xinu.at>

Uhm, yeah. Forget I ever created a wrapper for that...

Signed-off-by: Florian Pritz <bluewind@xinu.at>