Comment 0 for bug 1865525

Update the zuul.d/layout overrides for centos-8 equivalent replacements for centos-7 jobs

os-net-config
paunch
puppet-tripleo
python-tripleoclient
tripleo-common
tripleo-heat-templates
tripleo-image-elements
tripleo-puppet-elements
tripleo-ansible
os-apply-config
tripleo-validations
os-collect-config

gerrit topic: centos-8-jobs