Transite to conditional marks for skipping test scripts. (#16225)

What is the motivation for this PR?
In PR #16083, we transitioned some test scripts from pr_test_skip_scripts.yaml to conditional marks, focusing mainly on T0 test scripts. In this PR, we complete the transition by addressing the remaining scripts.

How did you do it?
In this PR, we complete the transition from pr_test_skip_scripts.yaml to conditional marks by addressing the remaining scripts.

How did you verify/test it?

tests/common/plugins/conditional_mark/tests_mark_conditions.yaml

@@ -64,35 +64,41 @@ arp/test_wr_arp.py:
 #######################################
 bfd/test_bfd.py:
   skip:
-    reason: "Test not supported for platforms other than Nvidia 4600c/4700/5600 and cisco-8102. Skipping the test"
+    reason: "Test not supported for platforms other than Nvidia 4600c/4700/5600 and cisco-8102. Skipping the test / KVM do not support bfd test"
+    conditions_logical_operator: or
     conditions:
       -  "(release in ['201811', '201911']) or (platform not in ['x86_64-mlnx_msn4600c-r0', 'x86_64-mlnx_msn4700-r0', 'x86_64-nvidia_sn5600-r0', 'x86_64-8102_64h_o-r0', 'x86_64-8101_32fh_o-r0'])"
+      - "asic_type in ['vs']"
 
 bfd/test_bfd.py::test_bfd_basic:
   skip:
     reason: "Test not supported for cisco as it doesnt support single hop BFD
-             and not supported for platforms other than Nvidia 4600c/4700/5600. Skipping the test"
+             and not supported for platforms other than Nvidia 4600c/4700/5600. Skipping the test / KVM do not support bfd test"
     conditions_logical_operator: or
     conditions:
       - "platform in ['x86_64-8102_64h_o-r0', 'x86_64-8101_32fh_o-r0', 'x86_64-8111_32eh_o-r0', 'x86_64-8122_64eh_o-r0', 'x86_64-8122_64ehf_o-r0']"
       - "platform not in ['x86_64-mlnx_msn4600c-r0', 'x86_64-mlnx_msn4700-r0', 'x86_64-nvidia_sn5600-r0', 'x86_64-8102_64h_o-r0', 'x86_64-8101_32fh_o-r0']"
       - "release in ['201811', '201911']"
+      - "asic_type in ['vs']"
 
 bfd/test_bfd.py::test_bfd_echo_mode:
   skip:
-    reason: "https://github.com/sonic-net/sonic-mgmt/issues/14087"
+    reason: "https://github.com/sonic-net/sonic-mgmt/issues/14087 / KVM do not support bfd test"
+    conditions_logical_operator: or
     conditions:
       - "https://github.com/sonic-net/sonic-mgmt/issues/14087"
+      - "asic_type in ['vs']"
 
 bfd/test_bfd.py::test_bfd_scale:
   skip:
     reason: "Test is not verified for cisco-8111 and cisco-8122 yet.
-             and not supported for platforms other than Nvidia 4600c/4700/5600. Skipping the test"
+             and not supported for platforms other than Nvidia 4600c/4700/5600. Skipping the test / KVM do not support bfd test"
     conditions_logical_operator: or
     conditions:
       - "platform in ['x86_64-8111_32eh_o-r0', 'x86_64-8122_64eh_o-r0', 'x86_64-8122_64ehf_o-r0']"
       - "platform not in ['x86_64-mlnx_msn4600c-r0', 'x86_64-mlnx_msn4700-r0', 'x86_64-nvidia_sn5600-r0', 'x86_64-8102_64h_o-r0', 'x86_64-8101_32fh_o-r0']"
       - "release in ['201811', '201911']"
+      - "asic_type in ['vs']"
 
 bfd/test_bfd_static_route.py:
   skip:
@@ -556,6 +562,12 @@ dualtor_io:
     conditions:
       - "'dualtor' not in topo_name"
 
+dualtor_io/test_grpc_server_failure.py:
+  skip:
+    reason: "This test only support on dualtor-aa testbed"
+    conditions:
+      - "'dualtor-aa' not in topo_name"
+
 dualtor_io/test_link_failure.py::test_active_link_admin_down_config_reload_link_up_downstream_standby[active-active]:
   xfail:
     reason: "Testcase ignored on mellanox setups due to github issue: https://github.com/sonic-net/sonic-buildimage/issues/16161"
@@ -644,6 +656,12 @@ dualtor_mgmt/test_dualtor_bgp_update_delay.py:
       - asic_type in ['vs']
       - https://github.com/sonic-net/sonic-mgmt/issues/14996
 
+dualtor_mgmt/test_egress_drop_nvidia.py:
+  skip:
+    reason: "This test is only for Nvidia platforms."
+    conditions:
+      - "asic_type not in ['mellanox']"
+
 dualtor_mgmt/test_server_failure.py::test_server_reboot:
   skip:
     reason: "KVM testbed does not have fanout hosts"
@@ -1292,6 +1310,15 @@ ipfwd/test_mtu.py:
     conditions:
       - "topo_type not in ['t1', 't2']"
 
+#######################################
+#####            ixia             #####
+#######################################
+ixia:
+  skip:
+    reason: "Ixia test only support on physical ixia testbed"
+    conditions:
+      - "asic_type in ['vs']"
+
 #######################################
 #####            k8s              #####
 #######################################
@@ -1996,17 +2023,25 @@ show_techsupport/test_auto_techsupport.py::TestAutoTechSupport::test_sai_sdk_dum
 #######################################
 #####         snappi_tests        #####
 #######################################
+snappi_tests:
+  skip:
+    reason: "Snappi test only support on physical tgen testbed"
+    conditions:
+      - "asic_type in ['vs']"
+
 snappi_tests/ecn/test_red_accuracy_with_snappi:
   skip:
-    reason: "Test should not be run as part of nightly."
+    reason: "Test should not be run as part of nightly. / Snappi test only support on physical tgen testbed"
+    conditions_logical_operator: or
     conditions:
       - "topo_type in ['tgen']"
+      - "asic_type in ['vs']"
 
 snappi_tests/multidut/pfc/test_multidut_global_pause_with_snappi.py:
   skip:
-    reason: "Global pause is not supported in cisco-8000."
+    reason: "Global pause is not supported in cisco-8000. / Snappi test only support on physical tgen testbed"
     conditions:
-      - "asic_type in ['cisco-8000']"
+      - "asic_type in ['cisco-8000', 'vs']"
 
 #######################################
 #####            snmp             #####

tests/dualtor_mgmt/test_egress_drop_nvidia.py

@@ -31,11 +31,6 @@
 # These two test cases are to cover the test gap introduced by the egress drop.
 
 
-@pytest.fixture(scope="module", autouse=True)
-def skip_non_nvidia_platforms(lower_tor_host): # noqa F811
-    if "mellanox" != lower_tor_host.facts["asic_type"]:
-        pytest.skip("This test is only for Nvidia platforms.")
-
 def test_egress_drop_standby_server_to_active_server(ptfhost, upper_tor_host, lower_tor_host, # noqa F811
                                  toggle_all_simulator_ports_to_upper_tor, # noqa F811
                                  toggle_simulator_port_to_lower_tor, tbinfo, ptfadapter): # noqa F811