Add mypy job

[gndrmnn]

Add mypy playbook, role and job definition for use in other Repos

Mypy is used for automatic Python type checking

[gndrmnn]

• TODO: requirements.txt needs to be installed before mypy is run

[osfrickler]

What repo do you plan to run this job in? Doing a random test I get:

osism/python-osism$ python3 -m mypy --ignore-missing-imports --install-types --non-interactive .
error: --install-types failed (no mypy cache directory)

[gndrmnn]

What repo do you plan to run this job in? Doing a random test I get:

osism/python-osism$ python3 -m mypy --ignore-missing-imports --install-types --non-interactive .
error: --install-types failed (no mypy cache directory)

We are working on the osism-flavor-manager, where the exact call stated in the ansible.command should work already.

The "no mypy cache directory" is probably related to this: python/mypy#10600

[osfrickler]

O.k., so let's start with this and adapt as needed

[gndrmnn]

Seems to have worked for the flavor manager repo https://github.com/osism/openstack-flavor-manager/pull/37/checks?check_run_id=15009303753 👍