doc: test and test-only targets do not run linter #4348

Job	Run time
Build slim tarball	2m 11s
aarch64-darwin: with shared libraries	20m 55s
x86_64-darwin: with shared libraries	39m 45s
aarch64-linux: with shared libraries	17m 53s
x86_64-linux: with shared libraries	21m 29s
	1h 42m 13s

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