Move test_trunk_subport_lifecycle to skip list

Related-Bug: #1956233

Signed-off-by: Chandan Kumar (raukadah) <chkumar@redhat.com>
Change-Id: I95063b22e6c3fd512370c1c6f4aeb7d8d38afa1a

roles/validate-tempest/vars/tempest_skip.yml

@@ -1137,3 +1137,16 @@ known_failures:
         reason: timing out in upstream infra, not rdo
         lp: https://bugs.launchpad.net/tripleo/+bug/1936420
     jobs: []
+  - test: 'neutron_tempest_plugin.scenario.test_trunk.TrunkTest.test_trunk_subport_lifecycle'
+    deployment:
+      - 'overcloud'
+    releases:
+      - name: master
+        reason: Test timed out waiting for port <> to transition to get status DOWN
+        installers:
+          - 'tripleo'
+        lp: https://bugs.launchpad.net/tripleo/+bug/1956233
+    jobs:
+      - periodic-tripleo-ci-centos-8-standalone-full-tempest-scenario-master
+      - periodic-tripleo-ci-centos-8-ovb-1ctlr_2comp-featureset020-master
+      - periodic-tripleo-ci-centos-9-standalone-full-tempest-scenario-master