As a fedora-infra member, I want to have datanommer's packaging automated

[StephenCoady]

Acceptance Criteria

• packit.yml is added to the project
• once added, we can successfully create released rpms for datanommer
• https://src.fedoraproject.org/rpms/datanommer is now updated by packit

[AdamWill]

The datanommer package is vestigial and essentially useless at this point. The important packages are python-datanommer-models, python-datanommer-consumer, and datanommer-commands.