CI: fix check-failure.sh sudo missing

this produces errors itself, e.g.:

```
 for container in $failed_containers
+ docker inspect prometheus_openstack_exporter
[]
permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get "http://%2Fvar%2Frun%2Fdocker.sock/v1.45/containers/prometheus_openstack_exporter/json

": dial unix /var/run/docker.sock: connect: permission denied
```

Signed-off-by: Sven Kieske <kieske@osism.tech>
Change-Id: I280e2660d187d966098ae39df6392503b1aa5bdf

tests/check-failure.sh

@@ -15,8 +15,8 @@ check_podman_failures() {
         --filter status=unknown)
 
     for container in $failed_containers; do
-        podman inspect $container
-        podman logs $container
+        sudo podman inspect $container
+        sudo podman logs $container
     done
 }
 
@@ -41,8 +41,8 @@ check_docker_failures() {
         --filter status=dead)
 
     for container in $failed_containers; do
-        docker inspect $container
-        docker logs $container
+        sudo docker inspect $container
+        sudo docker logs $container
     done
 }