test_runner: support custom message for expectFailure #3239

Job	Run time
Build slim tarball	1m 38s
x86_64-darwin: with shared libraries	1h 10m 40s
aarch64-linux: with shared libraries	37m 19s
aarch64-darwin: with shared libraries	44m 1s
x86_64-linux: with shared libraries	1h 47m 48s
	4h 21m 26s

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