Changes in python packaging tooling mean that the wsgi_scripts
functionality via PBR may not longer function.
This patch switches cloudkitty from using the PBR wsgi_scripts method to
using a new wsgi module that provides the same behavior as the generated
wsgi scripts provided.
A related devstack patch enables devstack to setup uWSGI to use the new
module path instead of the generated wsgi scripts.
For more details see the proposed OpenStack goal [1].
Make grenade job non-voting until backport to stable/2025.1.
[1] https://review.opendev.org/c/openstack/governance/+/902807
Change-Id: Id38cfa97699f01be89b37a9ee7a9e3253925e187
2a29211052