test_runner: make it compatible with fake timers #4551

Job	Run time
Build slim tarball	1m 54s
x86_64-darwin: with shared libraries	42m 38s
x86_64-linux: with shared libraries	24m 3s
aarch64-linux: with shared libraries	19m 19s
aarch64-darwin: with shared libraries	18m 11s
	1h 46m 5s

Provide feedback