FIx LXD drivers shutdown exception handling

[dann1]

Description
During shutdown:

• container is loaded 2 times even if no exception occur
• vnc connection is not stopped if the container storage fails to be dismantled, leaving
• wild containers do not get forced stop if timeout is detected
• reboot action is susceptible to timeout issues

To Reproduce
Steps to reproduce the behavior.

Expected behavior

• always stop vnc
• always force shutdown wild containers if running after timeout
• load only once the container if everything succeeds
• validate timeout issues in reboot

Details

• Affected Component: Virtualization Driver
• Hypervisor: LXD
• Version: 5.8.0

Additional context
Add any other context about the problem here.

Progress Status

• Branch created
• Code committed to development branch
• Testing - QA
• Documentation
• Release notes - resolved issues, compatibility, known issues
• Code committed to upstream release/hotfix branches
• Documentation committed to upstream release/hotfix branches