kubevirt-dm: DataMover Pod/Uploader Actions

[weshayutin]

Description:
Create/update the appropriate BSL manifest/checkpoint files for the VM and upload these and upload the qcow2 files.
Update the DataUpload status appropriately (including the total/incremental size)

Subtasks:

DOD:

[mpryc]

Related #2060

[shubham-pampattiwar]

parent issue #2063