`deploy_service`: set vars depending on the product_type

geant/gap_ansible/roles/deploy_service_config/tasks/set_vars.yaml

+---
+- name: Set router and vendor for the use with SBP
+  when: subsciption.product.product_type == 'L3CoreService'
+  ansible.builtin.set_fact:
+    router: "{{ ap.sbp.edge_port.node }}"
+    vendor: "{{ router.vendor }}"