test_runner: add env option to run function #2274

Job	Run time
Build slim tarball	1m 37s
aarch64-linux: with shared libraries	22m 43s
aarch64-darwin: with shared libraries	23m 32s
x86_64-linux: with shared libraries	26m 38s
x86_64-darwin: with shared libraries	51m 47s
	2h 6m 17s

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