Adds is_commissioning variable set to True (project-chip#37566)

Author: raul-marquez-csa

src/python_testing/TC_SC_4_3.py

@@ -57,7 +57,7 @@
 class TC_SC_4_3(MatterBaseTest):
 
     def steps_TC_SC_4_3(self):
-        return [TestStep(1, "DUT is commissioned on the same fabric as TH."),
+        return [TestStep(1, "DUT is commissioned on the same fabric as TH.", is_commissioning=True),
                 TestStep(2, "TH reads ServerList attribute from the Descriptor cluster on EP0. ",
                          "If the ICD Management cluster ID (70,0x46) is present in the list, set supports_icd to true, otherwise set supports_icd to false."),
                 TestStep(3,