Cinder sometimes needs to communicate with nova,
for example to notify VMs when live-resizing a disk.
Under certain circumstances,
the autodetected authentication details don't work,
so we must add a dedicated section in the config
for the nova client with proper credentials.
This issue has been observed on victoria and newer,
hence the addition of cinder.conf for victoria.
func-test-pr: https://github.com/openstack-charmers/zaza-openstack-tests/pull/776
Closes-Bug: #1939389
Co-authored-by: Samuel Walladge <samuel.walladge@canonical.com>
Change-Id: I6d44223b7c2863c6d9c62b46a41275fd360f92d1