[ovn][ipv6] Skip test_update_delete_extra_route

The issue is random and when it reproduces, any test
involving localport(metadata access) ran just after
test_update_delete_extra_route fails as metadata
flows are missing.

The issue do not reproduce in ovn-22.06+(since [1]).

So until issue's fix is available in Ubuntu jammy,
we can skip this test.

[1] https://github.com/ovn-org/ovn/commit/eaf9832be2

Related-Bug: #2007565
Related-Bug: #2007166
Change-Id: Ie2f5ff169bb3007694b9858465125775cfee40f4

zuul.d/tempest-singlenode.yaml

@@ -745,7 +745,7 @@
       # TODO(ykarel) remove once ubuntu jammy contains fixed version
       # of ovn https://bugs.launchpad.net/neutron/+bug/2007166
       tempest_exclude_regex: "\
-          (^tempest.scenario.test_network_basic_ops.TestNetworkBasicOps.*)"
+          (test_update_delete_extra_route)"
 
 - job:
     name: neutron-ovn-tempest-ipv6-only-ovs-master