Fix coverage metric for Sonarcloud analysis

[lewismc]

The following error message indicates that the "Fix code coverage paths" stage in build.yml needs to be implemented.

00:33:18.445 INFO: Sensor Cobertura Sensor for Python coverage [python]
00:33:18.446 DEBUG: Using pattern 'coverage.xml' to find reports
00:33:18.529 INFO: Python test coverage
00:33:18.532 INFO: Parsing report '/github/workspace/coverage.xml'
00:33:18.595 WARN: Invalid directory path in 'source' element: /home/runner/work/tagbase-aws-cdk/tagbase-aws-cdk/src
00:33:18.598 ERROR: Cannot resolve the file path 'app.py' of the coverage report, the file does not exist in all 'source'.
00:33:18.611 ERROR: Cannot resolve 10 file paths, ignoring coverage measures for those files