Enable ignored unit tests

[HHobeck]

Description

• Review Ignored unit tests #3919

Close #3919

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[HHobeck]

@arturcic: Please fix this test:

[Test]
[Ignore("This test is not working on GitHub Actions")]
public void WriteVersionInfoTaskShouldLogOutputVariablesToBuildOutputInGitHubActions()

[arturcic]

@HHobeck I think we need to remove this test

[Test]
[Ignore("Support of multiple tunks are not implemented at the moment.")]
public void VerifyNonMainMainlineVersionIdenticalAsMain()

And whenever we add support we will add tests

[mergify]

Thank you @HHobeck for your contribution!