This implements the "Ceph Config via Ceph Cluster CRD" design document
as a `cephConfig:` structure on the CRD.
This also fixes the `yq` commands used to manipulate the
`cluster-test.yaml` that caused CI issues for this PR and potentially
unknowingly others.
Signed-off-by: Alexander Trost <galexrt@googlemail.com>
(cherry picked from commit 4ed35d6bd6)