Bump up Ansible supported versions to 5.x/6.x

This change bumps up the maximum supported Ansible version to 6.x
(ansible-core 2.13.x) and minimum to 5.x. This synchronises Kayobe with
Kolla Ansible.

Shebang has been removed from modules due to [1].

os_openstacksdk_version has been added as openstack cloud modules don't
support versions greater than 0.99.

[1]: https://github.com/ansible/ansible/pull/76677

Depends-On: https://review.opendev.org/c/openstack/kolla-ansible/+/867546
Change-Id: Ibb00f6d079442a8509411ae8a71d74fd7bd8cccd