doc: enable necessary features when building docs (#812) #255

Job	Run time
run with leak saniziter	5m 21s
run with address saniziter	6m 4s
run with single worker thread and deadlock detection	4m 58s
misc check	5s
check build with madsim	1m 37s
rust doc test (ubuntu-latest)	2m 12s
rust doc test (macos-latest)	1m 51s
rust doc test (windows-latest)	3m 35s
rust ffmt check (ubuntu-latest)	23s
rust test with codecov (ubuntu-latest, stable)	10m 48s
rust ffmt check (macos-latest)	17s
rust udeps test (ubuntu-latest)	6m 44s
rust test with codecov (ubuntu-latest, 1.81.0)	9m 15s
rust ffmt check (windows-latest)	1m 30s
rust udeps test (macos-latest)	8m 11s
rust test with codecov (macos-latest, stable)	6m 25s
rust udeps test (windows-latest)	13m 12s
rust test with codecov (macos-latest, 1.81.0)	4m 34s
rust test with codecov (windows-latest, stable)	10m 35s
rust test with codecov (windows-latest, 1.81.0)	9m 51s
	1h 47m 28s

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