test_runner: show interrupted test on SIGINT #3166

Job	Run time
Build slim tarball	1m 31s
aarch64-linux: with shared libraries	35m 54s
aarch64-darwin: with shared libraries	47m 2s
x86_64-linux: with shared libraries	51m 0s
x86_64-darwin: with shared libraries	1h 7m 14s
	3h 22m 41s

Provide feedback