Updating changes for XML spec parsing and adding unit tests:

- Enhanced XmlDataTypeComponent with fields for docs, types, and constraints in spec parsing module
- Added support for detecting optional and nullable fields in XML in spec parsing module
- Improved constraint parsing for min/max values and attribute references in spec parsing module
- Added comprehensive test coverage using 1.4.1 cluster spec XML files in TestSpecParsingDataType unit test module
- Improved test output with detailed statistics on XML field usage in TestSpecParsingDataType unit test module and spec parsing module

Author: j-ororke

.github/workflows/tests.yaml

@@ -539,6 +539,7 @@ jobs:
                   scripts/run_in_python_env.sh out/venv 'python3 src/python_testing/TestConformanceTest.py'
                   scripts/run_in_python_env.sh out/venv 'python3 src/python_testing/TestIdChecks.py'
                   scripts/run_in_python_env.sh out/venv 'python3 src/python_testing/TestMatterTestingSupport.py'
+                  scripts/run_in_python_env.sh out/venv 'python3 src/python_testing/TestSpecParsingDataType.py'
                   scripts/run_in_python_env.sh out/venv 'python3 src/python_testing/TestSpecParsingDeviceType.py'
                   scripts/run_in_python_env.sh out/venv 'python3 src/python_testing/TestSpecParsingSelection.py'
                   scripts/run_in_python_env.sh out/venv 'python3 src/python_testing/TestSpecParsingSupport.py'