test_runner: use primordials in utils.js #1887

Job	Run time
Build slim tarball	1m 42s
x86_64-linux: with shared libraries	29m 24s
aarch64-linux: with shared libraries	25m 37s
x86_64-darwin: with shared libraries	58m 56s
aarch64-darwin: with shared libraries	28m 16s
	2h 23m 55s

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