CI: Disable ZIP file artifacts, update versions

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.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes #18411

.github/workflows/smatch.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
     - name: Checkout smatch
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         repository: error27/smatch
         ref: master
@@ -26,7 +26,7 @@ jobs:
         cd $GITHUB_WORKSPACE/smatch
         make -j$(nproc)
     - name: Checkout OpenZFS
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         ref: ${{ github.event.pull_request.head.sha }}
         path: zfs