enable _remote_ tests to report the summary via the remote link

[rotty3000]

to avoid the need to enable -runtrace just to see the summary.

[kriegfrj]

It is possible to register arbitrary/custom TestListener implementations as OSGi services. biz.aQute.tester.junit-platform will then invoke those callbacks while the tests are running.

This is one way of doing it, but I'm not sure how important it is for you to have backward compatibility with biz.aQute.tester for this feature.

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[kriegfrj]

This could be solved simultaneously with #5397 using the same mechanism.