Description of problem:
The failure reason is not exposed on VM status if it's failed to import the disk image.
We have this feature in 4.9/4.10, but miss on the new UI.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. create a vm by specify a small disk than the actual disk image
2.
3.

Actual results:
It only show DataVolumeError in vm status

Expected results:
It should expose why the VM is in failed status.

Additional info: