Fix `junit` output format and improve all of the unit tests

[haeser]

Context

Apparently some tools are very picky and require the XML to conform to the official XSDs very strictly. This PR fixes the junit test report format along with improving a lot of the tests. The xcresult file was updated to a test run of the library itself.

It looks like a lot of changes but most of it is test resources. The actual code changes are very small.

Summary of changes

• Fix junit output format to conform to the XSD
• Improve tests
  • Updates the xcresult file
  • Adds expected outcomes to compare against
  • Introduces a new protocol, for now, to ease tests
• Changes the timestamp in the cobertura output to the test executions date time for deterministic tests

I checked all the xml output manually against

• https://github.com/junit-team/junit5/blob/main/platform-tests/src/test/resources/jenkins-junit.xsd
• https://docs.sonarqube.org/8.9/analyzing-source-code/generic-test-data/

[haeser]

thanks for your feedback @a7ex appreciate it I'll incorporate them on Monday

[haeser]

@a7ex ping 😬 I need this to complete another task I'm working on 😅 thank you

[a7ex]

@haeser pong. Sorry for the delay.