Ansible 9 (ansible-core 2.16) support

[moreati]

follow on to #1021

https://docs.ansible.com/ansible/devel/porting_guides/porting_guide_9.html
https://github.com/ansible/ansible/blob/stable-2.16/changelogs/CHANGELOG-v2.16.rst

[moreati]

Mitogen 0.3.7 is out https://pypi.org/project/mitogen/0.3.7/ with Ansible 8 and 9 support.