chore: enable test_buffer (sonic-net#20219)

Signed-off-by: Austin Pham <austinpham@microsoft.com>
Signed-off-by: Yael Tzur <ytzur@nvidia.com>

Author: auspham

tests/common/plugins/conditional_mark/tests_mark_conditions.yaml

@@ -2455,7 +2455,7 @@ qos/test_buffer.py:
     reason: "These tests don't apply to cisco 8000 platforms or T2 or M* since they support only traditional model."
     conditions_logical_operator: or
     conditions:
-      - "asic_type in ['cisco-8000'] or 't2' in topo_name"
+      - "asic_type in ['cisco-8000'] or topo_type == 't2'"
       - "topo_type in ['m0', 'mx', 'm1']"
 
 qos/test_buffer.py::test_buffer_model_test:
@@ -2464,7 +2464,7 @@ qos/test_buffer.py::test_buffer_model_test:
     conditions_logical_operator: or
     conditions:
       - "asic_type in ['mellanox'] or asic_subtype in ['broadcom-dnx']"
-      - "asic_type in ['cisco-8000'] or 't2' in topo_name"
+      - "asic_type in ['cisco-8000'] or topo_type == 't2'"
       - "topo_type in ['m0', 'mx', 'm1']"
 
 qos/test_buffer_traditional.py: