change to annotation based volume config

README.md

examples/pod-with-local-volume/kustomization.yaml

examples/pod-with-local-volume/pod.yaml

examples/pvc-with-local-volume/kustomization.yaml

examples/pvc-with-local-volume/pvc.yaml

provisioner.go

test/pod_test.go

test/testdata/pod-with-local-volume/kustomization.yaml

test/testdata/pod-with-subpath/kustomization.yaml