[stress route] Enable test_stress_routes for T1 topo sonic-net#10841

What is the motivation for this PR?
test_stress_routes was skipped for T1 topo, need to enable it.

How did you do it?
add topo t1 in the mark

How did you verify/test it?
run test with T1 TB.

tests/stress/test_stress_routes.py

@@ -14,7 +14,7 @@
 logger = logging.getLogger(__name__)
 
 pytestmark = [
-    pytest.mark.topology('t0', 'm0', 'mx')
+    pytest.mark.topology('t0', 't1', 'm0', 'mx')
 ]