test_runner: support custom message for expectFailure #2773

Job	Run time
Build slim tarball	1m 45s
aarch64-linux: with shared libraries	1h 30m 23s
aarch64-darwin: with shared libraries	1h 41m 48s
x86_64-linux: with shared libraries	1h 57m 3s
x86_64-darwin: with shared libraries	2h 42m 59s
	7h 53m 58s

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