Use DOCUMENTER_KEY for CompatHelper #799

Job	Run time
test (min, ubuntu-latest, Enzyme)	10m 52s
test (min, ubuntu-latest, ForwardDiff)	8m 35s
test (min, ubuntu-latest, Mooncake)	10m 23s
test (min, ubuntu-latest, Tracker)	8m 10s
test (min, ubuntu-latest, ReverseDiff)	8m 29s
test (min, ubuntu-latest, Zygote)	8m 48s
test (min, macOS-latest, Enzyme)	6m 45s
test (min, macOS-latest, ForwardDiff)	5m 12s
test (min, macOS-latest, Mooncake)	7m 15s
test (min, macOS-latest, Tracker)	5m 47s
test (min, macOS-latest, ReverseDiff)	5m 48s
test (min, macOS-latest, Zygote)	5m 33s
test (1, ubuntu-latest, Enzyme)	13m 9s
test (1, ubuntu-latest, ForwardDiff)	10m 15s
test (1, ubuntu-latest, Mooncake)	13m 29s
test (1, ubuntu-latest, Tracker)	10m 10s
test (1, ubuntu-latest, ReverseDiff)	10m 54s
test (1, ubuntu-latest, Zygote)	10m 57s
test (1, macOS-latest, Enzyme)	8m 43s
test (1, macOS-latest, ForwardDiff)	6m 31s
test (1, macOS-latest, Mooncake)	8m 39s
test (1, macOS-latest, Tracker)	7m 32s
test (1, macOS-latest, ReverseDiff)	6m 16s
test (1, macOS-latest, Zygote)	7m 4s
	3h 25m 16s

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