Hide after_script output if return code is zero (#5862)

.gitlab-ci.yml

@@ -54,7 +54,7 @@ before_script:
   script:
     - ./tests/scripts/testcases_run.sh
   after_script:
-    - ./tests/scripts/testcases_cleanup.sh
+    - chronic ./tests/scripts/testcases_cleanup.sh
 
 # For failfast, at least 1 job must be defined in .gitlab-ci.yml
 # Premoderated with manual actions

.gitlab-ci/terraform.yml

@@ -44,7 +44,7 @@
     - tests/scripts/testcases_run.sh
   after_script:
     # Cleanup regardless of exit code
-    - ./tests/scripts/testcases_cleanup.sh
+    - chronic ./tests/scripts/testcases_cleanup.sh
 
 tf-validate-openstack:
   extends: .terraform_validate