CI: Disable ZIP file artifacts, update versions

[tonyhutter]

Motivation and Context

1. Don't ZIP artifacts
2. Update CI action versions.

Description

The GH artifacts action now lets you disable auto-zipping your artifacts. Previously, GH would always automatically put your artifacts in a ZIP file. This is annoying when your artifacts are already in a tarball.

Also update the following action versions:

checkout:		    v4 -> v6
upload-artifact:	v4 -> v7
download-artifact:	v4 -> v8

Lastly, fix a issue where zfs-qmeu-packages now needs to power cycle the VM.

How Has This Been Tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Performance enhancement (non-breaking change which improves efficiency)
• Code cleanup (non-breaking change which makes code smaller or more readable)
• Quality assurance (non-breaking change which makes the code more robust against bugs)
• Breaking change (fix or feature that would cause existing functionality to change)
• Library ABI change (libzfs, libzfs_core, libnvpair, libuutil and libzfsbootenv)
• Documentation (a change to man pages or other documentation)

Checklist:

• My code follows the OpenZFS code style requirements.
• I have updated the documentation accordingly.
• I have read the contributing document.
• I have added tests to cover my changes.
• I have run the ZFS Test Suite with this change applied.
• All commit messages are properly formatted and contain Signed-off-by.