test_runner: support custom message for expectFailure #2818

Job	Run time
Build slim tarball	1m 43s
x86_64-darwin: with shared libraries	1h 10m 3s
x86_64-linux: with shared libraries	2h 3m 30s
aarch64-darwin: with shared libraries	2h 41m 22s
aarch64-linux: with shared libraries	1h 30m 34s
	7h 27m 12s

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