The custom runner is now using 22.04 so we can drop our hacks to deal
with broken libssh and glusterfs. The provisioning scripts will be
updated in a separate commit.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20220914155950.804707-21-alex.bennee@linaro.org>