This reverts commit 8de7585f37.
Reason for revert:
Current devstack disables GLOBAL_VENV automatically in CentOS or Rocky
so we don't have to override the option. GLOBAL_VENV=True is required
to migrate the jobs to Ubuntu 24.04 (Noble) .
This also changes the default API deployment method to uwsgi because
uwsgi is now globally used in CI and only works for global venv
method.
Conflicts:
.zuul.yaml
Change-Id: Iec6ab6b4fcdb60caa67197acb5ada0678c0309ce
1c4761ecca