Add neutron-tempest-plugin-fwaas-ovn job

The existing job is now renamed from "neutron-tempest-plugin-fwaas" to
"neutron-tempest-plugin-fwaas-openvswitch" and there is also new job,
based on the ML2/OVN backend added as well.

Change-Id: I7026750882e59ce2b3b9e26d840c62f208be5945
diff --git a/zuul.d/2024_1_jobs.yaml b/zuul.d/2024_1_jobs.yaml
index 0fb6e88..674d1ab 100644
--- a/zuul.d/2024_1_jobs.yaml
+++ b/zuul.d/2024_1_jobs.yaml
@@ -279,7 +279,7 @@
 
 - job:
     name: neutron-tempest-plugin-fwaas-2024-1
-    parent: neutron-tempest-plugin-fwaas
+    parent: neutron-tempest-plugin-fwaas-openvswitch
     nodeset: openstack-single-node-jammy
     override-checkout: stable/2024.1
     vars: