ci/b2c: run the machine registration check before the test container

This was a regression I introduced in 6f9614c187 and it took me until
now to realize :o

Fixes: 6f9614c187 ("ci/b2c: Reduce the length of the kernel cmdline")
Signed-off-by: Martin Roukala (né Peres) <martin.roukala@mupuf.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32628>

.gitlab-ci/b2c/b2c.yml.jinja2.jinja2

@@ -60,6 +60,7 @@ deployment:
               b2c.volume={{ volume }}
               {% endfor %}
               b2c.run_service="--privileged --tls-verify=false --pid=host docker://{{ '{{' }} fdo_proxy_registry }}/gfx-ci/ci-tron/telegraf:latest" b2c.hostname=dut-{{ '{{' }} machine.full_name }}
+              b2c.run="-ti --tls-verify=false docker://{{ '{{' }} fdo_proxy_registry }}/gfx-ci/ci-tron/machine-registration:latest check"
               b2c.run="-v {{ '{{' }} job_bucket }}-results:{{ working_dir }} -w {{ working_dir }} {% for mount_volume in mount_volumes %} -v {{ mount_volume }}{% endfor %} --tls-verify=false docker://{{ local_container }} {{ container_cmd | replace('"', '\\\"') }}"
     kernel:
 {% if kernel_url %}