Python spec parsing: Derived cluster grammar changed.

The grammar for how command directions are inidcated changed in
the underlying files. This affected derived clusters. Test updated
to use the new grammar, meta-test updated.

src/python_testing/TestSpecParsingSupport.py

@@ -119,7 +119,7 @@ def get_access_enum_from_string(access_str: str) -> Clusters.AccessControl.Enums
     '    </attribute>'
     '  </attributes>'
     '  <commands>'
-    '    <command id="0x00" name="ChangeToMode" response="ChangeToModeResponse">'
+    '    <command id="0x00" name="ChangeToMode" response="ChangeToModeResponse" direction="commandToServer">'
     '      <access invokePrivilege="operate"/>'
     '      <mandatoryConform/>'
     '      <field id="0" name="NewMode" type="uint8">'
@@ -164,11 +164,11 @@ def get_access_enum_from_string(access_str: str) -> Clusters.AccessControl.Enums
     '    </attribute>'
     '  </attributes>'
     '  <commands>'
-    '    <command id="0x00" name="ChangeToMode" direction="commandToClient">'
+    '    <command id="0x00" name="ChangeToMode">'
     '      <access invokePrivilege="operate"/>'
     '      <disallowConform/>'
     '    </command>'
-    '    <command id="0x01" name="ChangeToModeResponse" direction="commandToClient">'
+    '    <command id="0x01" name="ChangeToModeResponse">'
     '      <access invokePrivilege="operate"/>'
     '      <disallowConform/>'
     '    </command>'

src/python_testing/spec_parsing_support.py

@@ -358,7 +358,7 @@ def get_command_type(self, element: ElementTree.Element) -> CommandType:
                 return CommandType.ACCEPTED
             raise Exception(f"Unknown direction: {element.attrib['direction']}")
         except KeyError:
-            return CommandType.ACCEPTED
+            return CommandType.UNKNOWN
 
     def parse_unknown_commands(self) -> list[XmlCommand]:
         commands = []