ci: testbed: increase test runtime from 53min to 58min

New cram tests require to increase the CI runtime timeout.

Let's extend the test runtime timeout by 5 minutes.

Signed-off-by: Houssem Dafdouf <houssem.dafdouf_ext@softathome.com>

.gitlab/testbed.yml

@@ -1,7 +1,7 @@
 .testbed:
   stage: run
   image: "$CI_REGISTRY_IMAGE/$CI_DESIGNATED_BRANCH_SLUG/testbed:latest"
-  timeout: 53 minutes
+  timeout: 58 minutes
   rules:
     - if: '$CI_PIPELINE_SOURCE == "schedule"'
       when: never