Experiment with the new JUnit-Platform Mojo

[laeubi]

This is an experiment in how much the new tycho junit-platform mojo can replace "traditional" tycho-surefire test and what are possibly missing pieces.

For this is:

• it creates a pom.xml so we have full control and do not need to modify the parent
• there we explicitly disable maven surefire
• configure the new mojo as an additional execution

[github-actions[bot]]

Test Results

0 files   -  1 920  0 suites   - 1 920   0s ⏱️ - 1h 53m 4s 0 tests  -  4 721  0 ✅  -  4 696  0 💤  -  24  0 ❌ ±0  0 runs   - 14 010  0 ✅  - 13 842  0 💤  - 167  0 ❌ ±0 

Results for commit 57c81083. ± Comparison against base commit 5a5410b0.

:recycle: This comment has been updated with latest results.

[laeubi]

Executing this locally results in

Test run finished after 1315 ms
[        40 containers found      ]
[         0 containers skipped    ]
[        40 containers started    ]
[         0 containers aborted    ]
[        40 containers successful ]
[         0 containers failed     ]
[       259 tests found           ]
[         0 tests skipped         ]
[       259 tests started         ]
[         0 tests aborted         ]
[       222 tests successful      ]
[        37 tests failed          ]

because currently the "use UI harness" feature is not implemented / available. But as we can already see a lot of tests simply don't need that at all!

So next would be to evaluate if we can add the "missing" support with an extension here.