tests/lcitool: Refresh submodule and remove libxml2

tests/lcitool: Refresh submodule and remove libxml2

The previous commit removed all uses of libxml2.

Refresh lcitool submodule, update qemu.yml and refresh the generated
files by running:

  $ make lcitool-refresh

Note: This refreshment also removes libudev dependency on Fedora
and CentOS due to libvirt-ci commit 18bfaee ("mappings: Improve
mapping for libudev"), since "The udev project has been absorbed
by the systemd project", and lttng-ust on FreeBSD runners due to
libvirt-ci commit 6dd9b6f ("guests: drop lttng-ust from FreeBSD
platform").

Reviewed-by: Daniel P. Berrangé <[email protected]>
Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Signed-off-by: Alex Bennée <[email protected]>
Message-Id: <20220121154134[email protected]>
Message-Id: <20220204204335.1689602[email protected]>