tests: Run debos with verbose logging

Avoid failing silently in case of fakemachine boot issues.

.gitlab-ci.yml

@@ -188,14 +188,14 @@ test-image-builder-shared-runner:
     name: $CI_REGISTRY_IMAGE/${RELEASE}-image-builder:${TEST_TAG}
     entrypoint: [ "" ]
   script:
-    - debos -t osname:${DISTRO} -t suite:${RELEASE} -t mirror:"${MIRROR}" -t required_backend:uml image-builder/test-recipe.yaml
+    - debos --verbose --show-boot -t osname:${DISTRO} -t suite:${RELEASE} -t mirror:"${MIRROR}" -t required_backend:uml image-builder/test-recipe.yaml
 
 test-image-builder-kvm-runner:
   extends: test-image-builder-shared-runner
   tags:
     - kvm
   script:
-    - debos -t osname:${DISTRO} -t suite:${RELEASE} -t mirror:"${MIRROR}" -t required_backend:kvm image-builder/test-recipe.yaml
+    - debos --verbose --show-boot -t osname:${DISTRO} -t suite:${RELEASE} -t mirror:"${MIRROR}" -t required_backend:kvm image-builder/test-recipe.yaml
 
 test-flatdeb-builder:
   stage: image test