Skip tests/vxlan/test_vnet_bgp_route_precedence.py for non cisco and …

…mnlx platforms (sonic-net#16266)

What is the motivation for this PR?
Skip tests/vxlan/test_vnet_bgp_route_precedence.py for non cisco and mnlx platforms

How did you do it?
Add skip condition in conditional mark file

How did you verify/test it?
Run tests/vxlan/test_vnet_bgp_route_precedence.py on broadcom platform

tests/common/plugins/conditional_mark/tests_mark_conditions.yaml

@@ -2409,6 +2409,12 @@ vrf/test_vrf_attr.py::TestVrfAttrSrcMac::test_vrf1_neigh_with_default_router_mac
 #######################################
 #####           vxlan            #####
 #######################################
+vxlan/test_vnet_bgp_route_precedence.py:
+  skip:
+    reason: "test_vnet_bgp_route_precedence can only run on cisco and mnlx platforms."
+    conditions:
+      - "asic_type not in ['cisco-8000', 'mellanox']"
+
 vxlan/test_vnet_route_leak.py:
   skip:
     reason: "Test skipped due to issue #8374"

tests/vxlan/test_vnet_bgp_route_precedence.py

@@ -185,7 +185,7 @@ def fixture_setUp(duthosts,
         data['loopback_v6'] = data['minigraph_facts']['minigraph_lo_interfaces'][0]['addr']
     asic_type = duthosts[rand_one_dut_hostname].facts["asic_type"]
     if asic_type not in ["cisco-8000", "mellanox"]:
-        raise RuntimeError("Pls update this script for your platform.")
+        pytest.skip(f"{asic_type} is not a supported platform for this test. Only support MNLX and CISCO platforms.")
 
     # Should I keep the temporary files copied to DUT?
     ecmp_utils.Constants['KEEP_TEMP_FILES'] = \