build, doc: use new api doc tooling #588

Job	Run time
Build slim tarball	4m 49s
aarch64-darwin: with shared libraries	30m 9s
x86_64-darwin: with shared libraries	52m 10s
x86_64-linux: with shared libraries	29m 11s
aarch64-linux: with shared libraries	7m 52s
	2h 4m 11s

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