Description of problem:

As of right now, a velero backup and restore currently blocks awaiting for the data mover action to complete before processing all of the plugins. We want to update the code to kick off all of the data mover processes asynchronously while allowing Velero to process the rest of its resources. Then Velero should wait for the data movers to complete before marking the backup/restore as completed

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

1.1.0

How reproducible:

100%

Steps to Reproduce:
1. Run a backup with data mover enabled

Actual results:

Observe the logs of the velero pods and see that velero blocks waiting for a DM process to complete rather than processing all of its resources before waiting for it to complete.

Expected results:

Data mover process should be asynchronous

Additional info: