Set GLOBAL_VENV to false for centos and rocky

As a temporary workaround, let's set the GLOBAL_VENV to false
specifically for centos 9 stream and rocky distros where we
encountered issues after changing the default value
of GLOBAL_VENV to True in Devstack:
https://review.opendev.org/c/openstack/devstack/+/558930

Related-Bug: #2031639
Change-Id: I708b5a81c32b0bd650dcd63a51e16346863a6fc0
2 files changed