doc: enable necessary features when building docs #251

Job	Run time
run with leak saniziter	5m 26s
run with single worker thread and deadlock detection	4m 58s
check build with madsim	1m 28s
run with address saniziter	6m 5s
misc check	7s
rust doc test (ubuntu-latest)	2m 11s
rust ffmt check (ubuntu-latest)	35s
rust doc test (macos-latest)	1m 32s
rust test with codecov (ubuntu-latest, stable)	6m 35s
rust ffmt check (macos-latest)	16s
rust doc test (windows-latest)	2m 12s
rust test with codecov (ubuntu-latest, 1.81.0)	6m 36s
rust ffmt check (windows-latest)	1m 15s
rust udeps test (ubuntu-latest)	6m 36s
rust test with codecov (macos-latest, stable)	5m 53s
rust udeps test (macos-latest)	6m 37s
rust test with codecov (macos-latest, 1.81.0)	4m 20s
rust udeps test (windows-latest)	6m 11s
rust test with codecov (windows-latest, stable)	6m 20s
rust test with codecov (windows-latest, 1.81.0)	6m 22s
	1h 21m 35s

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