v1.3.8

fix controller requeues, rbac (#79)

* fix controller requeues, rbac

- drop obsolete requeues
- add rbac verb to allow deletion on `secret` & `configmap` resources
- drop the `controllers/registries/internal/mocks` pkg, use `controller-runtime`'s `fake` client instead
- iron out duplicate and bulky imports
- helm-chart: create serviceAccount by default

* fix controller-gen target