doc: enable necessary features when building docs #254

Job	Run time
check build with madsim	1m 28s
run with address saniziter	6m 3s
run with leak saniziter	5m 21s
run with single worker thread and deadlock detection	4m 44s
misc check	6s
rust doc test (ubuntu-latest)	1m 47s
rust doc test (macos-latest)	1m 44s
rust ffmt check (ubuntu-latest)	18s
rust udeps test (ubuntu-latest)	1m 21s
rust doc test (windows-latest)	3m 52s
rust test with codecov (ubuntu-latest, stable)	10m 11s
rust ffmt check (macos-latest)	15s
rust udeps test (macos-latest)	1m 10s
rust ffmt check (windows-latest)	30s
rust test with codecov (ubuntu-latest, 1.81.0)	8m 38s
rust udeps test (windows-latest)	2m 12s
rust test with codecov (macos-latest, stable)	4m 34s
rust test with codecov (macos-latest, 1.81.0)	3m 37s
rust test with codecov (windows-latest, stable)	8m 53s
rust test with codecov (windows-latest, 1.81.0)	7m 29s
	1h 14m 13s

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