Add yast2_clone_system to validate generated profile on stagingY

I updated the yaml scheduler.
I havent done any other change in test_suite but it seems that
adding yast2_clone_system requires to update the variables of the
suite including
`REPO_SLE_MODULE_DEVELOPMENT_TOOLS=SLE-15-SP2-Module-Development-Tools-POOL-x86_64-%BUILD%-Media1`

Although the VR fails for now and need investigation

schedule/staging/autoyast_mini@64bit-staging.yaml

@@ -8,6 +8,7 @@ schedule:
     - autoyast/installation
     - autoyast/console
     - autoyast/login
+    - console/yast2_clone_system
     - autoyast/wicked
     - autoyast/repos
     - autoyast/clone