test: improve config-file permission test coverage #1434

Job	Run time
Build slim tarball	1m 37s
x86_64-darwin: with shared libraries	4h 19m 19s
x86_64-linux: with shared libraries	2h 32m 47s
aarch64-darwin: with shared libraries	2h 16m 31s
aarch64-linux: with shared libraries	2h 25m 31s
	11h 35m 45s

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