devfile/library doesn't reflect ephemeral volume setting

[kadel]

/kind bug

Which area this bug is related to?

/area library

What versions of software are you using?

Operating System:

Go Pkg Version:
devfile/library v1.2.0

Bug Summary

To Reproduce:
define ephemeral devfile volume component

- name: volume-test
  volume:
    ephemeral: true

currently, it will create PVC volume

      volumes:
      - name: volume-test-volume
        persistentVolumeClaim:
          claimName: volume-test-pvc

Expected behavior

if ephemeral: true the kubernetes volume inside Deployment should be emptyDir

      volumes:
      - name: volume-test-volume
        emptyDir: {}