Don't test on 'lts' and 'pre' for draft PRs #590

Job	Run time
1 - DIT (Formalities)	2m 22s
1 - DIT (Zero)	11m 43s
1 - DI (Formalities)	1m 48s
1 - DIT (ForwardDiff)	3m 45s
1 - DI (Internals)	5m 27s
1 - DI (Back/Diffractor)	2m 14s
1 - DIT (Weird)	7m 10s
1 - DI (Back/Enzyme)	14m 35s
lts - DIT (Zero)	5s
1 - DI (Back/FastDifferentiation)	3m 26s
lts - DIT (ForwardDiff)	4s
1 - DI (Back/FiniteDiff)	2m 36s
pre - DIT (Formalities)	3s
1 - DI (Back/FiniteDifferences)	2m 18s
pre - DIT (Zero)	4s
1 - DI (Back/ForwardDiff)	8m 50s
pre - DIT (ForwardDiff)	6s
1 - DI (Back/PolyesterForwardDiff)	2m 43s
pre - DIT (Weird)	4s
1 - DI (Back/ReverseDiff)	5m 43s
1 - DI (Back/SecondOrder)	6m 15s
1 - DI (Back/Symbolics)	3m 28s
1 - DI (Back/Tapir)	7m 18s
1 - DI (Back/Tracker)	2m 0s
1 - DI (Back/Zygote)	5m 30s
1 - DI (Down/Detector)	2m 47s
1 - DI (Down/DifferentiateWith)	2m 42s
1 - DI (Down/Flux)	4m 26s
lts - DI (Internals)	3s
lts - DI (Back/FiniteDifferences)	11s
lts - DI (Back/ForwardDiff)	5s
lts - DI (Back/ReverseDiff)	5s
lts - DI (Back/Tracker)	7s
lts - DI (Back/Zygote)	7s
lts - DI (Down/DifferentiateWith)	4s
pre - DI (Internals)	4s
pre - DI (Back/Diffractor)	8s
pre - DI (Back/FastDifferentiation)	8s
pre - DI (Back/FiniteDiff)	3s
pre - DI (Back/FiniteDifferences)	7s
pre - DI (Back/ForwardDiff)	7s
pre - DI (Back/PolyesterForwardDiff)	7s
pre - DI (Back/ReverseDiff)	5s
pre - DI (Back/Symbolics)	4s
pre - DI (Back/Tracker)	8s
pre - DI (Back/Zygote)	4s
pre - DI (Down/DifferentiateWith)	5s
pre - DI (Down/Flux)	3s
	1h 51m 27s

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