Downgrade Archlinux CI test to libxml 2.13.8 (2.14 can not be used with Hurl Linux build)

.github/workflows/package.yml

@@ -186,11 +186,22 @@ jobs:
       with:
         image: archlinux
         options: --volume ${{ github.workspace }}:/work --workdir /work --privileged
+# Revert to libxml 2.13.8 that has a soname libxml2.so.2 required by our Ubuntu Hurl build.
+# Starting from libxml 2.14, <https://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.14.0>:
+#
+# > Binary compatibility is restricted to versions 2.14 or newer. On ELF systems, the soname was bumped from
+# > libxml2.so.2 to libxml2.so.16.
+#
+# We downgrade when testing the Hurl generic package, not when we're building the Hurl package on Arch Linux as the soname
+# problem arise only with the generic package.
         run: |
           set -e
           echo "::group::Install system prerequisites"
             bin/install_prerequisites_archlinux.sh
           echo "::endgroup::"
+          echo "::group::Downgrade libxml2"
+          pacman --upgrade --nodeps --noconfirm https://archive.archlinux.org/packages/l/libxml2/libxml2-2.13.8-1-x86_64.pkg.tar.zst
+          echo "::endgroup::"
           echo "::group::Activate python3 venv"
             bin/activate_python3_venv.sh
             export PATH=/tmp/hurl-python3-venv/bin:$PATH

bin/install_prerequisites_archlinux.sh

@@ -21,4 +21,3 @@ sudo rm -v /dev/shm/squid*.shm >/dev/null 2>&1 || true
 
 # Temporary install to patch a python3/pip crash
 pacman -Syu --noconfirm expat
-