[WIP] Add deploy manifests for dev storage setup on GKE

[tnozicka]

Description of your changes: Just an idea for now, we may use it for running cheap GKE clusters (without dedicated SSDs) for development or CI.

As there can be only one default storage class, it needs

kubectl patch storageclass standard -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"false"}}}'