Rework humanTimeUnit() formats of meters #4724

Job	Run time
build-dragonflybsd-latest-gcc	3m 42s
build-freebsd-latest-clang	3m 23s
build-macos-latest-clang	47s
build-netbsd-latest-gcc	3m 22s
build-openbsd-latest-clang	3m 35s
build-solaris-latest-gcc	7m 11s
build-ubuntu-latest-clang-analyzer	1m 20s
build-ubuntu-latest-clang-sanitizer	2m 44s
build-ubuntu-latest-full-featured-clang	1m 13s
build-ubuntu-latest-full-featured-gcc	1m 49s
build-ubuntu-latest-gcc-static	1m 25s
build-ubuntu-latest-minimal-clang	1m 55s
build-ubuntu-latest-minimal-gcc	36s
build-ubuntu-latest-pcp	32s
lint-pcp-config	3s
lint-whitespace	3s
	33m 40s

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