ci/cirrus: use vagrant from hashicorp repo

A version of vagrant available from the stock repos (2.2.19) is too old
and contains a bug that prevents downloading Fedora 38 image (see [1]).

Use packages from hashicorp repo, which currently has vagrant 2.3.4.
This resolves the problem of downloading the latest Fedora image.

Also, vagrant-libvirt plugin from Ubuntu repos is not working with
vagrant from hashicorp, so switch to using "vagrant plugin install".
The downside it, this takes extra 4 minutes or so in our CI, and I
am not sure how to cache it or speed it up.

[1] https://github.com/opencontainers/runc/pull/3835#issuecomment-1519321619

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

.cirrus.yml

@@ -37,9 +37,15 @@ task:
     # -----
     cat /proc/cpuinfo
   install_libvirt_vagrant_script: |
+    curl -fsSL https://apt.releases.hashicorp.com/gpg | sudo gpg --dearmor -o /usr/share/keyrings/hashicorp-archive-keyring.gpg
+    echo "deb [signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] https://apt.releases.hashicorp.com $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/hashicorp.list
+    sudo sed -i 's/^# deb-src/deb-src/' /etc/apt/sources.list
     apt-get update
-    apt-get install -y libvirt-daemon libvirt-daemon-system vagrant vagrant-libvirt
+    apt-get install -y libvirt-daemon libvirt-daemon-system vagrant
     systemctl enable --now libvirtd
+    apt-get build-dep -y vagrant ruby-libvirt
+    apt-get install -y --no-install-recommends libxslt-dev libxml2-dev libvirt-dev ruby-bundler ruby-dev zlib1g-dev
+    vagrant plugin install vagrant-libvirt
   vagrant_cache:
     fingerprint_script: uname -s ; cat Vagrantfile.$DISTRO
     folder: /root/.vagrant.d