Test

Add `universalaccess.reduceMotion` option #1175

Job	Run time
install-against-stable	3m 5s
install-flake-against-stable	3m 35s
install-against-unstable	4m 8s
install-flake-against-unstable	4m 24s
test-stable	36s
test-unstable	10m 0s
	25m 48s

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