Added skip to vxlan decap test due to sonic-buildimage sonic-net#22056 (sonic-net#18799)

* Added skip to vxlan decap test due to sonic-net/sonic-buildimage#22056

* Update tests_mark_conditions.yaml

Signed-off-by: Yael Tzur <[email protected]>

Author: AharonMalkin

tests/common/plugins/conditional_mark/tests_mark_conditions.yaml

@@ -3340,6 +3340,10 @@ vxlan/test_vxlan_decap.py:
     reason: "vxlan support not available for cisco-8122 platforms"
     conditions:
       - "platform in ['x86_64-8122_64eh_o-r0', 'x86_64-8122_64ehf_o-r0']"
+  xfail:
+    reason: "Skipped due to bug https://github.com/sonic-net/sonic-buildimage/issues/22056"
+    conditions:
+      - "topo_name in ['t0-isolated-d16u16s1','t0-isolated-d32u32s2'] and https://github.com/sonic-net/sonic-buildimage/issues/22056"
 
 vxlan/test_vxlan_ecmp.py:
   skip: