Create generic solution for backup and restore for Kubernetes

[pkosiec]

Description

Create a generic way to back up Kubernetes resources, including Persistent Volumes and k8s objects. Use findings from investigation made in #218.

1. Install Velero as a part of Capact installation. Make it optional.
2. Create Velero runner:
   1. Use velero command or K8S API to create Backup/Restore CR objects
   2. Add OCH Manifests(Interface, Implementation and Types)
   3. Agree on where to store backups. Separate MinIO, S3?
3. Deploy and use as a default new storage provider lcm-localpv
   1. make sure that that all manifests can be still deployed. Users other than root can not access the directory.
4. Create backup helm-plugin. As a starting point, use https://github.com/capactio/velero-plugin-helm
   1. It should require only helm release name to work
   2. All resources created in Helm charts should be added to a backup
   3. All resources created later, for example PVC also should be added to the backup
5. Create restore plugin for Capact restore
   1. It should be able to restore Action CR with proper status
   2. It should recreate OwnerReference for a Secret creted for Action

Reason

We should provide backup and restore functionality for Capact and also other Kubernetes-based deployments.

See also

OCF manifests for OpenEBS: capactio/hub-manifests#30