doc: enable necessary features when building docs #252

Job	Run time
run with single worker thread and deadlock detection	4m 38s
run with address saniziter	5m 53s
run with leak saniziter	5m 19s
check build with madsim	1m 24s
misc check	5s
rust doc test (ubuntu-latest)	2m 16s
rust ffmt check (ubuntu-latest)	18s
rust doc test (macos-latest)	2m 38s
rust test with codecov (ubuntu-latest, stable)	10m 27s
rust ffmt check (macos-latest)	16s
rust doc test (windows-latest)	2m 41s
rust ffmt check (windows-latest)	25s
rust test with codecov (ubuntu-latest, 1.81.0)	9m 10s
rust udeps test (ubuntu-latest)	6m 51s
rust udeps test (macos-latest)	5m 25s
rust test with codecov (macos-latest, stable)	5m 37s
rust udeps test (windows-latest)	11m 25s
rust test with codecov (macos-latest, 1.81.0)	3m 43s
rust test with codecov (windows-latest, stable)	10m 51s
rust test with codecov (windows-latest, 1.81.0)	9m 57s
	1h 39m 19s

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