ci: delete camunda sts before the upgrade (#3972)

Author: aabouzaid

charts/camunda-platform-8.8/test/integration/scenarios/pre-upgrade/delete-camunda-sts.sh

@@ -0,0 +1,6 @@
+# Delete the StatefulSet of Camunda Orchestration cluster as the "matchLabels" changed
+# after the rename from "core" to "orchestration".
+kubectl delete sts -n "${TEST_NAMESPACE}" -l app.kubernetes.io/component=core --ignore-not-found
+# Adding "orchestration" also, as this will change again before the final release, to avoid the need to delete the StatefulSet.
+# It will be again "zeebe-broker" as the 8.7 release.
+kubectl delete sts -n "${TEST_NAMESPACE}" -l app.kubernetes.io/component=orchestration --ignore-not-found