Add pip-and-virtualenv to arm64 images
Add pip-and-virtualenv to arm64 images

These images were forgtten in 7602343b6a7100059ed8f13fa00cb2ca7d34734c
so they don't have virtualenv/pip pre-installed any more.  Put it back
while we work on fixing deployment without these tools

Change-Id: If0763623f4e0dd700162f5dda9b198f3bf785d2c
Story: #2007386

openstack-infra/project-config,openstack-infra/project-config