Don't test on 'lts' and 'pre' for draft PRs #583

Job	Run time
1 - DIT (Formalities)	4s
1 - DIT (Zero)	7s
1 - DI (Formalities)	4s
1 - DIT (ForwardDiff)	3s
1 - DI (Internals)	7s
1 - DIT (Weird)	8s
1 - DI (Back/Diffractor)	8s
lts - DIT (Zero)	4s
1 - DI (Back/Enzyme)	7s
lts - DIT (ForwardDiff)	7s
1 - DI (Back/FastDifferentiation)	3s
pre - DIT (Formalities)	4s
1 - DI (Back/FiniteDiff)	4s
pre - DIT (Zero)	3s
1 - DI (Back/FiniteDifferences)	3s
pre - DIT (ForwardDiff)	6s
1 - DI (Back/ForwardDiff)	3s
pre - DIT (Weird)	7s
1 - DI (Back/PolyesterForwardDiff)	9s
1 - DI (Back/ReverseDiff)	8s
1 - DI (Back/SecondOrder)	5s
1 - DI (Back/Symbolics)	7s
1 - DI (Back/Tapir)	9s
1 - DI (Back/Tracker)	6s
1 - DI (Back/Zygote)	5s
1 - DI (Down/Detector)	3s
1 - DI (Down/DifferentiateWith)	7s
1 - DI (Down/Flux)	3s
lts - DI (Internals)	6s
lts - DI (Back/FiniteDifferences)	3s
lts - DI (Back/ForwardDiff)	8s
lts - DI (Back/ReverseDiff)	6s
lts - DI (Back/Tracker)	7s
lts - DI (Back/Zygote)	3s
lts - DI (Down/DifferentiateWith)	3s
pre - DI (Internals)	5s
pre - DI (Back/Diffractor)	4s
pre - DI (Back/FastDifferentiation)	6s
pre - DI (Back/FiniteDiff)	12s
pre - DI (Back/FiniteDifferences)	3s
pre - DI (Back/ForwardDiff)	5s
pre - DI (Back/PolyesterForwardDiff)	5s
pre - DI (Back/ReverseDiff)	4s
pre - DI (Back/Symbolics)	8s
pre - DI (Back/Tracker)	3s
pre - DI (Back/Zygote)	5s
pre - DI (Down/DifferentiateWith)	4s
pre - DI (Down/Flux)	4s
	4m 18s

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