sysutils/py-ansible-core*: Convert py-ansible-core to a metaport
- Move sysutils/py-ansible-core to sysutils/py-ansible-core218.
- Add a metaport, sysutils/py-ansible-core pointing to sysutils/py-ansible-core218.
- Convert sysutils/py-ansible-core219 and sysutils/py-ansible-core220 to master ports for use as master ports.
This is in preparation to upgrade sysutils/py-ansible-core to 2.19.
The reason for this is as is stated in commit 8b9df0bef174,
incompatibilities may require users to adjust their playbooks and roles
in order to work on ansible-core 2.19.
See: https://docs.ansible.com/ansible/latest/porting_guides/porting_guide_core_2.19.html