TC-DESC-2.2: Fix comparison when mfg label is in the list

Unit tests included, also tested on an example app with mfg tags

src/python_testing/TestMatterTestingSupport.py

@@ -548,6 +548,14 @@ def test_tag_list_problems(self):
         problems = find_tag_list_problems(roots, device_types, simple)
         asserts.assert_equal(len(problems), 0, "Unexpected problems found in list")
 
+        # Tags with mfg tags
+        tag_mfg = Clusters.Descriptor.Structs.SemanticTagStruct(mfgCode=0xFFF1, label="test")
+        tag_label = Clusters.Descriptor.Structs.SemanticTagStruct(tag=1, label="test")
+        simple[1][Clusters.Descriptor][Clusters.Descriptor.Attributes.TagList] = [tag1, tag_mfg]
+        simple[2][Clusters.Descriptor][Clusters.Descriptor.Attributes.TagList] = [tag1, tag_label]
+        problems = find_tag_list_problems(roots, device_types, simple)
+        asserts.assert_equal(len(problems), 0, "Unexpected problems found in list")
+
     def test_root_node_tag_list_functions(self):
         # Example topology - see comment above for the layout.
         # There are 4 direct children of root 0

src/python_testing/taglist_and_topology_test_support.py

@@ -18,6 +18,7 @@
 import functools
 from collections import defaultdict
 from dataclasses import dataclass, field
+from chip.clusters.Types import Nullable, NullValue
 from typing import Any
 
 import chip.clusters as Clusters
@@ -143,12 +144,16 @@ def create_device_type_list_for_root(direct_children, endpoint_dict: dict[int, A
 
 
 def cmp_tag_list(a: Clusters.Descriptor.Structs.SemanticTagStruct, b: Clusters.Descriptor.Structs.SemanticTagStruct):
+    if type(a.mfgCode) != type(b.mfgCode):
+        return -1 if type(a.mfgCode) is Nullable else 1
     if a.mfgCode != b.mfgCode:
         return -1 if a.mfgCode < b.mfgCode else 1
     if a.namespaceID != b.namespaceID:
         return -1 if a.namespaceID < b.namespaceID else 1
     if a.tag != b.tag:
         return -1 if a.tag < b.tag else 1
+    if type(a.label) != type(b.label):
+        return -1 if type(a.label) is Nullable or a.label is None else 1
     if a.label != b.label:
         return -1 if a.label < b.label else 1
     return 0