feat(VDI_exportContent): create xapi task during NBD export for VHD

[MathieuRA]

Screenshot

Description

See zammad#19003

Checklist

• Commit
  • Title follows commit conventions
  • Reference the relevant issue (Fixes #007, See xoa-support#42, See https://...)
  • If bug fix, add Introduced by
• Changelog
  • If visible by XOA users, add changelog entry
  • Update "Packages to release" in CHANGELOG.unreleased.md
• PR
  • If UI changes, add screenshots
  • If not finished or not tested, open as Draft

[fbeauchamp]

since there is a new task visible in during the export, you can add a screenshot

[julien-f]

1. Is there a source for this PR?
2. Why do we want to create a XAPI task instead of an XO task?

[olivierlambert]

I can answer 2. I think: at least a XAPI task will be visible in XO Lite, so we can guess directly from the host there's something happening right now. It doesn't mean we can't do both (create the task on XAPI and build an XO task on top of it)

[fbeauchamp]

1. I proposed this change, the source are multiple tickets of users asking why they don't have tasks, like the 19003.
2. xo tasks are not ready to display any progress. xo task aren't easily available, for now, in this part of the code.

[julien-f]

Please rebase.