This PR updates GH Actions to use Nodejs v20

Solution:

• as dorny/test-reporter GH Action is stuck with the update to support actions/upload-artifact@v4
• turns off downloading test results managed dorny/test-reporter with removing artifact options
• adds additional downloading step before dorny/test-reporter using actions/download-artifact@v4 actions
• and use actions/upload-artifact@v4 everywhere

Notes:

• after opening PR against master the unit tests will be triggered, but Test Report will fail because the GH Actions don't want to take the last incoming changes of the corresponding workflow file and uses already existing changes in the master branch that are incompatible. And after merging in the next release iteration, everything should work as expected
• the first release launch
  
• the next release launch