[test] ci/gha: run tests in own systemd slice

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>

Author: kolyshkin

.github/workflows/test.yml

@@ -119,6 +119,10 @@ jobs:
       run: |
         sed "s;^profile runc /usr/sbin/;profile runc-test $PWD/;" < /etc/apparmor.d/runc | sudo apparmor_parser
 
+    - name: Setup machine-runc.slice
+      if: matrix.os == 'ubuntu-24.04'
+      run: sudo ./script/setup_host_ubuntu.sh
+
     - name: unit test
       if: matrix.rootless != 'rootless'
       run: sudo -E PATH="$PATH" -- make TESTFLAGS="${{ matrix.race }}" localunittest

script/setup_host_ubuntu.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+set -eux -o pipefail
+
+cat >/etc/systemd/system/machine-runc.slice <<EOF
+[Unit]
+Description=runc containers
+Before=slices.target
+
+[Slice]
+Delegate=yes
+EOF
+
+systemctl daemon-reload
+systemctl start machine-runc.slice
+systemctl status machine-runc.slice