Added aarch64 specific case on yast_no_self_update

schedule/yam/test_cases/yast_no_self_update_aarch64.yaml

@@ -0,0 +1,15 @@
+---
+name: yast_no_self_update
+description:    >
+  Test suite conducts installation with self-update explicitly disabled. No
+  hard checks are done that the self-updating is really disabled.
+  Installation is validated by successful boot and that YaST does not report
+  any issue.
+schedule:
+  license_agreement:
+    - installation/validate_no_self_update
+    - installation/licensing/accept_license
+  product_selection:
+    - installation/validate_no_self_update
+  software:
+    - installation/installation_settings/validate_default_target