gitlab: make Cirrus CI jobs gating

The Cirrus CI jobs have been non-gating for a while to let us build
confidence in their reliability. Aside from periodic dependancy
problems when FreeBSD Ports switches to be based on a new FreeBSD
image version, the jobs have been reliable. It is thus worth making
them gating to prevent build failures being missed during merges.

Signed-off-by: "Daniel P. Berrangé" <berrange@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20230912184130.3056054-5-berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230914155422.426639-8-alex.bennee@linaro.org>

.gitlab-ci.d/cirrus.yml

@@ -19,7 +19,6 @@
   # as there's often a 5-10 minute delay before Cirrus CI
   # actually starts the task
   timeout: 80m
-  allow_failure: true
   script:
     - source .gitlab-ci.d/cirrus/$NAME.vars
     - sed -e "s|[@]CI_REPOSITORY_URL@|$CI_REPOSITORY_URL|g"