Add CI&Ops as test roles owners

Author: pablintino

.github/CODEOWNERS

@@ -52,6 +52,10 @@ roles/nat64_appliance @hjensas
 roles/ci_lvms_storage @fultonj @fmount @abays
 roles/ci_local_storage @fultonj @fmount @abays
 
+# Test
+roles/tempest @openstack-k8s-operators/ciops
+roles/test_operator @openstack-k8s-operators/ciops
+
 # Uni
 roles/ci_gen_kustomize_values/templates/uni* @openstack-k8s-operators/ciops