Mark "test_live_migration_with_trunk" as unstable

This issue is related to:
* https://bugs.launchpad.net/neutron/+bug/2033887: the patches
  previously merged in the Neutron repository [1][2] should be
  reverted.
* https://bugs.launchpad.net/neutron/+bug/2024160: this issue
  is still present.

[1]https://review.opendev.org/c/openstack/neutron/+/882581
[2]https://review.opendev.org/c/openstack/neutron/+/888776

Related-Bug: #2024160
Related-Bug: #2033887
Change-Id: Ic58fef4fa83a43eee97d1e5a09e259f604a8971a
diff --git a/tempest/api/compute/admin/test_live_migration.py b/tempest/api/compute/admin/test_live_migration.py
index 5384fe1..ef09269 100644
--- a/tempest/api/compute/admin/test_live_migration.py
+++ b/tempest/api/compute/admin/test_live_migration.py
@@ -258,6 +258,7 @@
         port = self.ports_client.show_port(port_id)['port']
         return port['status'] == 'ACTIVE'
 
+    @decorators.unstable_test(bug='2024160/2033887')
     @decorators.attr(type='multinode')
     @decorators.idempotent_id('0022c12e-a482-42b0-be2d-396b5f0cffe3')
     @utils.requires_ext(service='network', extension='trunk')