test_runner: support expecting a test-case to fail #1486

Job	Run time
Build slim tarball	1m 55s
x86_64-linux: with shared libraries	35m 52s
aarch64-linux: with shared libraries	30m 59s
x86_64-darwin: with shared libraries	39m 45s
aarch64-darwin: with shared libraries	30m 31s
	2h 19m 2s

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