Feature: add pre-checks to avoid failing at a later stage

[ableischwitz]

• remove OpenShift 4.12 / IPv6 installation blocker (issue didn't show up during tests)
• add 00-provision-hetzner.yml to setup.yml as it doesn't do anything unless requested.
• rename import_playbook to ansible.builtin.import_playbook.

Description

Checklist/ToDo's

• Added documentation?
• Added release note entry? ( docs/release-notes.md )
• Tested?

[rbo]

/ok-to-test

[skull-cicd]

💀 There was an error during pre-commit / linter:

[INFO] Initializing environment for https://github.com/ansible-community/ansible-lint.git.
[INFO] Initializing environment for https://github.com/ansible-community/ansible-lint.git:.[community,yamllint].
[INFO] Installing environment for https://github.com/ansible-community/ansible-lint.git.
[INFO] Once installed this environment will be reused.
[INFO] This may take a few minutes...
Ansible-lint.............................................................Failed
- hook id: ansible-lint
- exit code: 2

[WARNING]: Ansible is being run in a world writable directory
(/workspace/source), ignoring it as an ansible.cfg source. For more information
see
https://docs.ansible.com/ansible/devel/reference_appendices/config.html#cfg-in-
world-writable-dir
[WARNING]: Ansible is being run in a world writable directory
(/workspace/source), ignoring it as an ansible.cfg source. For more information
see
https://docs.ansible.com/ansible/devel/reference_appendices/config.html#cfg-in-
world-writable-dir
WARNING  Loading custom .yamllint config file, this extends our internal yamllint config.
WARNING  Listing 1 violation(s) that are fatal
yaml: wrong indentation: expected 4 but found 2 (indentation)
ansible/00-check-cluster-config.yml:9

You can skip specific rules or tags by adding them to your configuration file:
# .ansible-lint
warn_list:  # or 'skip_list' to silence them completely
  - yaml  # Violations reported by yamllint

Finished with 1 failure(s), 0 warning(s) on 168 files.

[skull-cicd]

💀 There was an error during pre-commit / linter:

[INFO] Initializing environment for https://github.com/ansible-community/ansible-lint.git.
[INFO] Initializing environment for https://github.com/ansible-community/ansible-lint.git:.[community,yamllint].
[INFO] Installing environment for https://github.com/ansible-community/ansible-lint.git.
[INFO] Once installed this environment will be reused.
[INFO] This may take a few minutes...
Ansible-lint.............................................................Failed
- hook id: ansible-lint
- exit code: 1

[WARNING]: Ansible is being run in a world writable directory
(/workspace/source), ignoring it as an ansible.cfg source. For more information
see
https://docs.ansible.com/ansible/devel/reference_appendices/config.html#cfg-in-
world-writable-dir
[WARNING]: Ansible is being run in a world writable directory
(/workspace/source), ignoring it as an ansible.cfg source. For more information
see
https://docs.ansible.com/ansible/devel/reference_appendices/config.html#cfg-in-
world-writable-dir
WARNING  Loading custom .yamllint config file, this extends our internal yamllint config.
an AnsibleCollectionFinder has not been installed in this process