ci: install newer criu for almalinux-8

We are seeing a ton on flakes on almalinux-8 CI job, all caused by criu
inability to freeze a cgroup. This was worked around in criu [1], but
obviously we can't rely on a distro vendor to update the package.

Let's use a copr (thanks to Adrian Reber!)

[1]: https://github.com/checkpoint-restore/criu/pull/2545

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

.cirrus.yml

@@ -31,7 +31,7 @@ task:
   install_dependencies_script: |
     case $DISTRO in
     *-8)
-      yum config-manager --set-enabled powertools # for glibc-static
+      dnf config-manager --set-enabled powertools # for glibc-static
       ;;
     *-9)
       dnf config-manager --set-enabled crb # for glibc-static
@@ -50,6 +50,15 @@ task:
     done
     [ $? -eq 0 ] # fail if yum failed
 
+    case $DISTRO in
+    *-8)
+      # Use newer criu (with https://github.com/checkpoint-restore/criu/pull/2545).
+      # Alas we have to disable container-tools for that.
+      dnf -y module disable container-tools
+      dnf -y copr enable adrian/criu-el8
+      dnf -y install criu
+    esac
+
     # Install Go.
     URL_PREFIX="https://go.dev/dl/"
     # Find out the latest minor release URL.