Gather required facts if relevant keys in ansible_facts are missing

[spike77453]

This adds an additional tasks to gather relevant facts if the corresponding keys (i.e. distribution, distribution_version, distribution_major_version, os_family) are not already present in the ansible_facts dict.

Since the documentation does not mention that fact gathering is required before using certain roles, this prevents errors such as #962

One could also add when: ansible_facts_fqdn is not defined ....
However, this is not always required (e.g. when using the role ipaclient only tasks/install.yml uses ansible_facts.fqdn) and ansible_facts.fqdn will always be preset after using ansible.builtin.setup with gather_subset: min.

[rjeffman]

Currently, all ansible-freeipa roles require both become: true and gather_facts: true. I like the idea of not requiring gather_facts: true.

Can you improve the commit message to show what problem it fixes, and how? An adaption of your PR text would be good.

And, if fqdn is also needed by the role, it should be added to the when clause of the role, as the idea here is to allow any role to work with gather_facts: false.

[rjeffman]

Closing this in favor of #1205 with a more strict data retrieval.

Thank you for raising the issue.