When no containers could be started we need to make sure the unit status
reflects this. This means we should not send the READ=1 message and not
keep the service container running when we were unable to start any
container.
There is the question what should happen when only a subset was started.
For systemd we can only be either running or failed. And as podman kube
play also just keeps the partial started pods running I opted to let
systemd keep considering this as success.
Fixes#20667
Fixes https://issues.redhat.com/browse/RHEL-80471
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
945aade38b