Add support for v2 registries.conf in c8-stream train/ussuri

[wes hayutin]

References:

https://review.opendev.org/c/openstack/tripleo-ansible/+/719584
https://github.com/containers/podman/issues/5764

Found while migrating stable/ussuri jobs found in upgrade jobs.

podman.x86_64 1.6.4-24.module_el8.3.0+706+33ce1279 @appstream

Error:
"error checking if pulling from registry for \"docker://192.168.24.1:8787/tripleotraincentos8/centos-binary-swift-proxy-server:14d4a91cb28f9a705b32d3638ac0c3f0\" is blocked: unable to parse the registries configuration (/etc/containers/registries.conf): mixing sysregistry v1/v2 is not supported"

https://logserver.rdoproject.org/91/32291/1/check/periodic-tripleo-ci-centos-8-singlenode-featureset050-upgrades-ussuri/37fea56/logs/undercloud/home/zuul/undercloud_install.log.txt.gz

https://logserver.rdoproject.org/91/32291/1/check/periodic-tripleo-ci-centos-8-singlenode-featureset050-upgrades-ussuri/37fea56/logs/undercloud/etc/containers/registries.conf.txt.gz

# This file is managed via tripleo-ansible

unqualified-search-registries = ['registry.redhat.io', 'registry.access.redhat.com', 'registry.fedoraproject.org', 'registry.centos.org', 'docker.io']

# registries configuration

# insecure registry list
[registries.insecure]
registries = ['undercloud.ctlplane.localdomain', '192.168.24.1', '192.168.24.3']

FIX:
update registries.conf to look like:
https://logserver.rdoproject.org/openstack-periodic-integration-stable1/opendev.org/openstack/tripleo-ci/master/periodic-tripleo-ci-centos-8-singlenode-featureset050-upgrades-victoria/3f25fd5/logs/undercloud/etc/containers/registries.conf.txt.gz

# This file is managed via tripleo-ansible

unqualified-search-registries = ['registry.redhat.io', 'registry.access.redhat.com', 'registry.fedoraproject.org', 'registry.centos.org', 'docker.io']

# registries configuration

# insecure registry list
[[registry]]
prefix = "undercloud.ctlplane.localdomain"
insecure = true
location = "undercloud.ctlplane.localdomain"
[[registry]]
prefix = "192.168.24.1"
insecure = true
location = "192.168.24.1"
[[registry]]
prefix = "192.168.24.3"
insecure = true
location = "192.168.24.3"
[[registry]]
prefix = "trunk.registry.rdoproject.org"
insecure = true
location = "trunk.registry.rdoproject.org"
[[registry]]
prefix = "quay.ceph.io"
insecure = true
location = "quay.ceph.io"

[Sagi (Sergey) Shnaidman (sshnaidm)]

The job is running in upstream as tripleo-ci-centos-8-undercloud-upgrade-ussuri and pass: https://zuul.opendev.org/t/openstack/builds?job_name=tripleo-ci-centos-8-undercloud-upgrade-ussuri
Checking if it's a problem with job definition in periodic pipeline.

[wes hayutin (weshayutin)]

https://review.rdoproject.org/r/#/q/topic:fs050_periodic+(status:open+OR+status:merged)