skip interface speed change as it causes crash. (sonic-net#19043)

What is the motivation for this PR?
Skip test case which cause orchagent crash on 7060x6 platform

How did you do it?
change from xfail to skip

How did you verify/test it?
=========================== short test summary info ============================
SKIPPED [2] iface_namingmode/test_iface_namingmode.py:678: Unsupported topology
SKIPPED [2] iface_namingmode/test_iface_namingmode.py:699: Unsupported topology
SKIPPED [2] iface_namingmode/test_iface_namingmode.py: Incorrect supported speeds for 7060X6 in STATE_DB, fix TBD
============ 54 passed, 6 skipped, 4 warnings in 1778.39s (0:29:38) ============

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

Author: sdszhang

tests/common/plugins/conditional_mark/tests_mark_conditions.yaml

@@ -1475,12 +1475,13 @@ iface_namingmode/test_iface_namingmode.py::TestConfigInterface:
       - "platform in ['x86_64-8111_32eh_o-r0']"
 
 iface_namingmode/test_iface_namingmode.py::TestConfigInterface::test_config_interface_speed:
-  xfail:
+  skip:
     reason: "Incorrect supported speeds for 7060X6 in STATE_DB, fix TBD"
     conditions_logical_operator: and
     conditions:
       - "'7060X6' in hwsku"
       - "topo_type in ['t1']"
+      - https://github.com/sonic-net/sonic-mgmt/issues/19034
 
 iface_namingmode/test_iface_namingmode.py::TestShowPriorityGroup:
   xfail: