.github/ci: add kola qemu test

this initial attempt runs right after the "packages" jobs and downloads
the resulting artifacts.

The QEMU image is unzipped then the kola test is running using the
ci-automation scripts.

Signed-off-by: Mathieu Tortuyaux <mtortuyaux@microsoft.com>

.github/workflows/ci.yaml

@@ -287,3 +287,53 @@ jobs:
             scripts/images/**/flatcar_production_*.sh
             scripts/images/**/flatcar_test_update.gz
             scripts/ebuild_logs.tar.xz
+  test:
+    name: "Run kola tests"
+    needs: packages
+    runs-on:
+      - debian
+      - kola
+      - self-hosted
+      - ${{ matrix.arch }}
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: ["amd64", "arm64"]
+    defaults:
+      run:
+        working-directory: scripts
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          path: scripts
+          fetch-depth: 0
+          submodules: true
+
+      # it downloads from the previous linked job.
+      - name: Download artifacts
+        uses: actions/download-artifact@v3
+        with:
+          name: images-${{ matrix.arch }}
+
+      - name: Run tests
+        shell: bash
+        run: |
+          exec 2>&1
+          set +x
+          set -euo pipefail
+
+          source ci-automation/test.sh
+
+          # TODO: REMOVE ME (for debugging purposes)
+          ls -ali
+          find . -type f -name "*.bz2"
+
+          # extract the image.
+          bzip2 --decompress scripts/images/**/flatcar_production_image.bin.bz2
+
+          # export the QEMU_IMAGE_NAME to avoid to download it.
+          export QEMU_IMAGE_NAME=$(readlink -f scripts/images/**/flatcar_production_image.bin)
+
+          # run the test.
+          test_run ${{ matrix.arch }} qemu