Add new `org.osbuild.cloud-init` stage, which currently allows to create
configuration files for cloud-init under `/etc/cloud/cloud.cfg.d`. The
stage supports only a very limited subset of cloud-init configuration
options, which is covering needs of RHEL AMI images.
The schema mandates that if the 'configuration_files' option is
specified, then at least one configuration file must be defined. In
addition each section of the configuration must contain at least one
property (section or configuration option).
Add `python3-pyyaml` package to the `F34-build` testing manifest,
because it is required for running and testing the new stage.
Regenerate all affected manifests.
Add test for the new stage.
Update the `osbuild-ci` container image used for testing to a new tag,
which includes python3-pyyaml, the dependency of the new stage.
Signed-off-by: Tomas Hozza <thozza@redhat.com>
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