Simplify definition of fips jobs

With the new base jobs, it is no longer necessary to define a pre-run
playbook.  You simply need to set enable_fips to True and specify an
nslookup_target.  This will set things up to use ubuntu jobs when FIPS
is supported on jammy

Depends-On: https://review.opendev.org/c/openstack/devstack/+/871606
Change-Id: I1c02c4817a39d26e94873831801089d1aa86133c
2 files changed