This commit patches the Cozystack API server to tolerate an absence of
Cozystack Resource Definitions either registered as CRDs on the k8s API
or simply as an absence of CozyRDs persisted to etcd. This decouples the
upgrade of the CozyRD CRD from the upgrade of the Cozystack API.
```release-note
[api,platform] Decouple the Cozystack API from the Cozystack Resource
Definitions, allowing independent upgrades of either one and a more
reliable migration from 0.36 to 0.37.
```
Signed-off-by: Timofei Larkin <lllamnyp@gmail.com>
4e766ed82e