Add a temporary job for project-config testing that mirrors
openstack-zuul-jobs-linters but uses ansible-lint tox environment.
This allows iteration on the lint tests for project-config.
Change-Id: I9fbfe70646f548b3ff1f3022933cab65481b347b
Needed-By: I1243aa8344a4573e3c43c3ced45cf740a631efa9