Split AD tests into a dedicated off-downgrade group (Mooncake 0.5 needs >= 1.10.8) #763

Job	Run time
tests / detect	48s
tests / Core (julia lts, ubuntu-latest) / Tests - Core (Julia lts)	4m 18s
tests / NoPre (julia 1, ubuntu-latest) / Tests - NoPre (Julia 1)	6m 18s
tests / Core (julia pre, ubuntu-latest) / Tests - Core (Julia pre)	6m 1s
tests / SymbolicIndexingInterface (julia pre, ubuntu-latest) / Tests - SymbolicIndexingInterface (Julia pre)	15m 29s
tests / Core (julia 1, ubuntu-latest) / Tests - Core (Julia 1)	6m 25s
tests / GPU (julia 1, self-hosted Linux X64 gpu) / Tests - GPU (Julia 1)	2m 7s
tests / QA (julia lts, ubuntu-latest) / Tests - QA (Julia lts)	2m 56s
tests / Downstream (julia lts, ubuntu-latest) / Tests - Downstream (Julia lts)	9m 56s
tests / Downstream (julia 1, ubuntu-latest) / Tests - Downstream (Julia 1)	17m 42s
tests / SymbolicIndexingInterface (julia lts, ubuntu-latest) / Tests - SymbolicIndexingInterface (Julia lts)	8m 54s
tests / QA (julia 1, ubuntu-latest) / Tests - QA (Julia 1)	5m 48s
tests / Downstream (julia pre, ubuntu-latest) / Tests - Downstream (Julia pre)	16m 59s
tests / NoPre (julia lts, ubuntu-latest) / Tests - NoPre (Julia lts)	3m 10s
tests / SymbolicIndexingInterface (julia 1, ubuntu-latest) / Tests - SymbolicIndexingInterface (Julia 1)	13m 25s
	2h 0m 16s

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